| **Loans and Allowance for Loan Losses** | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             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| **Loans Receivable, Net [Abstract]**    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     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| Loans and Allowance for Loan Losses     | Loans and Allowance for Loan LossesGeneralLoans held for investment are stated at the principal amounts outstanding adjusted for purchase premiums/discounts, deferred net loan fees and costs, and unearned income.  We report our loan portfolio by segments and classes, which are disaggregations of portfolio segments.  Our portfolio segments are:  Commercial and agricultural, Real estate, and Consumer loans.  The Commercial and agricultural loan and Consumer loan portfolios are not further segregated into classes.  The classes within the Real estate portfolio segment include Real estate - construction and Real estate - mortgage, which is further broken into 1-4 family residential mortgage and Commercial real estate mortgage loans. Loan fees and the incremental direct costs associated with originating a loan are deferred and subsequently recognized over the life of the loan as an adjustment to interest income.In addition to originating loans, we also purchase loans.  At acquisition, purchased loans are designated as either purchased contractual loans ("PC loans") or purchased impaired loans ("PI loans"). PC loans are acquired loans where management believes it is probable that it will receive all principal as of the date of acquisition.  These loans are accounted for under the contractual cash flow method, under ASC 310-20.  Any discount or premium paid on PC loans is recorded in interest income using the effective yield method over the expected life of the loans.  PI loans are acquired loans where management believes, at acquisition date, it is probable that all principal on the acquired loans will not be received.  PI loans are placed in homogeneous risk-based pools where accounting for projected cash flows is performed, as allowed under ASC 310-30.  Once a pool is established the individual loans within each pool do not change.  As management obtains new information related to changes in expected principal loss and expected cash flows, by pool, we record either an increase in yield when new expected cash flows increase, an allowance for loan losses when new expected cash flows decline, or a decrease in yield when there is only a timing difference in expected cash flows.Loans acquired in the Merger ("Granite Purchased Loans") included PI loans and PC loans. Loans designated as PC loans included performing revolving consumer and performing revolving commercial loans on acquisition date. The following table presents an aging analysis of accruing and nonaccruing loans as of March 31, 2014:(dollars in thousands) Accruing          30-59 days past due 60-89 days past due More than 90 days past due Nonaccrual Total past due and nonaccrual Current and accruing Total LoansPC and Originated Loans              Commercial and agricultural $43 $— $— $450 $493 $65,763 $66,256Real estate - construction 68 — — 3,437 3,505 52,599 56,104Real estate - mortgage:              1-4 family residential 4,130 — — 10,151 14,281 597,094 611,375Commercial 1,760 324 355 19,533 21,972 267,586 289,558Consumer 68 3 — 32 103 47,356 47,459Total $6,069 $327 $355 $33,603 $40,354 $1,030,398 $1,070,752PI loans              Commercial and agricultural $97 $— $2,354 $— $2,451 $7,271 $9,722Real estate - construction 54 — 4,569 — 4,623 6,577 11,200Real estate - mortgage:             1-4 family residential 137 195 2,366 — 2,698 17,701 20,399Commercial 123 — 15,440 — 15,563 90,989 106,552Consumer 2 — 13 — 15 1,145 1,160Total $413 $195 $24,742 $— $25,350 $123,683 $149,033Total Loans $6,482 $522 $25,097 $33,603 $65,704 $1,154,081 $1,219,785The following table presents an aging analysis of accruing and nonaccruing loans as of December 31, 2013:(dollars in thousands) Accruing          30-59 days past due 60-89 days past due More than 90 days past due Nonaccrual Total past due and nonaccrual Current and accruing Total LoansPC and Originated Loans              Commercial and agricultural $18 $43 $— $516 $577 $60,946 $61,523Real estate - construction 168 634 — 4,677 5,479 48,711 54,190Real estate - mortgage:              1-4 family residential 3,454 522 — 11,580 15,556 593,698 609,254Commercial 1,765 77 — 18,380 20,222 261,524 281,746Consumer 56 17 — 12 85 43,798 43,883Total $5,461 $1,293 $— $35,165 $41,919 $1,008,677 $1,050,596PI loans              Commercial and agricultural $35 $16 $1,977 $— $2,028 $8,701 $10,729Real estate - construction 48 — 2,758 — 2,806 7,087 9,893Real estate - mortgage:              1-4 family residential 135 9 2,907 — 3,051 23,802 26,853Commercial 903 — 17,479 — 18,382 94,796 113,178Consumer 6 — 12 — 18 981 999Total $1,127 $25 $25,133 $— $26,285 $135,367 $161,652Total Loans $6,588 $1,318 $25,133 $35,165 $68,204 $1,144,044 $1,212,248All PI loans are considered to be accruing for all periods presented, in accordance with ASC 310-30.Risk GradesThe risk-grade categories presented in the following table, which are standard categories used by the bank regulators, are:Pass - Loans categorized as Pass are higher quality loans that have adequate sources of repayment and little risk of collection.Special Mention - A Special Mention loan has potential weaknesses that deserve management's close attention.  If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution's credit position at some future date.  Special Mention loans are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification.Substandard - A Substandard loan is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any.  Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt.  They are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected.  Loss potential, while existing in the aggregate amount of Substandard loans, does not have to exist in individual assets classified Substandard.Doubtful - A loan classified as Doubtful has all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.  The possibility of loss is extremely high, but because of certain important and reasonable specific pending factors, which may work to the advantage of strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined.  Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral and refinancing plans.Loans categorized as Special Mention or worse are considered Criticized.  Loans categorized as Substandard or Doubtful are considered Classified.  Purchased loans acquired in the Merger are recorded at estimated fair value on the date of acquisition without the carryover of related ALL.  The table below includes $38.7 million and $40.5 million in Granite Purchased Loans categorized as Substandard or Doubtful at March 31, 2014 and December 31, 2013, respectively.  The following table presents loans held for investment balances by risk grade as of March 31, 2014:(dollars in thousands) Pass Special Mention Substandard Doubtful    (Ratings 1-5) (Rating 6) (Rating 7) (Rating 8) TotalCommercial and agricultural $70,782 $1,180 $4,016 $— $75,978Real estate - construction 54,331 3,275 9,698 — 67,304Real estate - mortgage:          1-4 family residential 601,449 9,234 21,091 — 631,774Commercial 310,951 29,466 55,693 — 396,110Consumer 48,205 39 66 309 48,619Total $1,085,718 $43,194 $90,564 $309 $1,219,785The following table presents loans held for investment balances by risk grade as of December 31, 2013:(dollars in thousands) Pass Special Mention Substandard Doubtful    (Ratings 1-5) (Rating 6) (Rating 7) (Rating 8) TotalCommercial and agricultural $67,277 $1,262 $3,713 $— $72,252Real estate - construction 50,138 3,984 9,961 — 64,083Real estate - mortgage:          1-4 family residential 601,304 10,887 23,916 — 636,107Commercial 307,661 29,711 57,552 — 394,924Consumer 44,450 40 47 345 44,882Total $1,070,830 $45,884 $95,189 $345 $1,212,248Loans included in the preceding loan composition table are net of participations sold.  Loans are increased by net loan premiums and deferred loan discounts or fees of $3.3 million at March 31, 2014.  Loans are increased by net deferred loan discounts or fees of  $3.6 million at December 31, 2013.At March 31, 2014 and December 31, 2013, loans held for sale consisted of originated residential mortgage loans held for sale carried at the lower of cost or fair market value.Loans serviced for others are not included in the consolidated balance sheet.  The unpaid principal balance of loans serviced for others amounted to $201.5 million at March 31, 2014 and $190.2 million at December 31, 2013.Loans PledgedTo borrow from the FHLB, members must pledge collateral to secure advances and letters of credit.  Acceptable collateral includes, among other types of collateral, a variety of residential, multifamily, home equity lines and second mortgages, and commercial loans.  Gross loans of $154.2 million and $23.9 million of investment securities, and gross loans of $169.5 million and $24.1 million of investment securities, were pledged to collateralize FHLB advances and letters of credit at March 31, 2014 and December 31, 2013, respectively, of which there was $29.7 million and $31.8 million of credit availability for borrowing, respectively. At March 31, 2014, $8.8 million of loans and $50.5 million of securities were pledged to collateralize potential borrowings from the Federal Reserve Discount Window, of which $54.1 million was available as borrowing capacity.  We could also access $292.9 million of additional borrowings from the FHLB under credit lines by pledging additional collateral.Nonaccruing and Impaired LoansInterest income on loans is calculated by using the interest method based on the daily outstanding balance.  The recognition of interest income is discontinued when, in management's opinion, the collection of all or a portion of interest becomes doubtful.  Loans are returned to accrual status when the factors indicating doubtful collectability cease to exist and the loan has performed in accordance with its terms for a demonstrated period of time.  The past due status of loans is based on the contractual payment terms.  Had nonaccruing loans been on accruing status, interest income would have been higher by $1.0 million and $1.1 million for the three months ended March 31, 2014 and March 31, 2013, respectively. At March 31, 2014 and December 31, 2013, COB had certain impaired loans of $33.6 million and $35.2 million, respectively, which were on nonaccruing interest status.All loan classes are considered past due when the contractual amounts due with respect to principal and interest are not received within 30 days of the contractual due date.  When we cannot reasonably expect full and timely repayment of a loan, the loan is placed on nonaccrual.  All loan classes on which principal or interest is in default for 90 days or more are put on nonaccrual status, unless there is sufficient documentation to conclude that the loan is well secured and in the process of collection.  A debt is "well-secured" if collateralized by liens on or pledges of real or personal property, including securities, which have a realizable value sufficient to discharge the debt in full, or by the guarantee of a financially responsible party.  A debt is "in process of collection" if collection is proceeding in due course either through legal action, including judgment enforcement procedures, or, in appropriate circumstances, through collection efforts not involving legal action that are reasonably expected to result in repayment of the debt or its restoration to a current status.Loans that are less than 90 days delinquent may also be placed on nonaccrual if deterioration in the financial condition of the borrower has increased the probability of less than full repayment.At the time a loan is placed on nonaccrual, all accrued, unpaid interest is charged off, unless it is documented that repayment of all principal and presently accrued but unpaid interest is probable.  Charge-offs of accrued and unpaid interest are charged against the current year's interest income and not against the current ALL.For all loan classes, a nonaccrual loan may be returned to accrual status when we can reasonably expect continued timely payments until payment in full.  All prior arrearage does not have to be eliminated, nor do all previously charged off amounts need to have been recovered, but the loan can still be returned to accrual status if the following conditions are met:  (1) all principal and interest amounts contractually due (including arrearage) are reasonably assured of repayment within a reasonable period; and (2) there is a sustained period of repayment performance (generally a minimum of six months) by the borrower, in accordance with the contractual terms involving payments of cash or cash equivalents.For all classes within all loan portfolios, cash receipts received on nonaccrual loans are applied entirely against principal until the loan or lease has been collected in full, after which time any additional cash receipts are recognized as interest income. For all loan classes, as soon as any portion of a loan becomes uncollectible, the loan will be charged down or charged off as follows:•If unsecured, the loan must be charged off in full.•If secured, the outstanding principal balance of the loan should be charged down to the net liquidation value of the collateral.Loans are considered uncollectible when:•No regularly scheduled payment has been made within four months and the determination is made that any further payment is unlikely, or•The loan is unsecured, the borrower has filed for bankruptcy protection and there is no other (guarantor, etc.) support from an entity outside of the bankruptcy proceedings.Based on a variety of credit, collateral and documentation issues, loans with lesser degrees of delinquency or obvious loss may also be deemed uncollectible.A loan is considered impaired, based on current information and events, if it is probable that we will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. If the loan has been modified to provide relief to the borrower, the loan is deemed to be impaired if all principal and interest will not be repaid according to the original contract.When a loan has been determined to be impaired, the amount of the impairment is measured using the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, the observable market price of the loan, or the fair value of the collateral if the loan is collateral dependent.  When the present value of expected future cash flows is used, the effective interest rate is the original contractual interest rate of the loan adjusted for any premium or discount.  When the contractual interest rate is variable, the effective interest rate of the loan changes over time.  A specific reserve is established as a component of the ALL when a loan has been determined to be impaired.  Subsequent to the initial measurement of impairment, if there is a significant change to the impaired loan's expected future cash flows, or if actual cash flows are significantly different from the cash flows previously estimated, we recalculate the impairment and appropriately adjust the specific reserve.  Similarly, if we measure impairment based on the observable market price of an impaired loan or the fair value of the collateral of an impaired collateral-dependent loan, we will adjust the specific reserve if there is a significant change in either of those bases.When a loan is impaired and principal and interest is in doubt when contractually due, interest income is not recognized.  Cash receipts received on nonaccruing impaired loans within any class are generally applied entirely against principal until the loan has been collected in full, after which time any additional cash receipts are recognized as interest income.  Cash receipts received on accruing impaired loans within any class are applied in the same manner as accruing loans that are not considered impaired.The following table summarizes information relative to impaired loans for the dates indicated:  March 31, 2014 December 31, 2013(dollars in thousands) Balance Associated Reserves Balance Associated ReservesImpaired loans, not individually reviewed for impairment $4,670 $— $4,612 $—Impaired loans, individually reviewed, with no impairment 33,317 — 39,865 —Impaired loans, individually reviewed, with impairment 8,112 1,119 2,965 927Total impaired loans, excluding purchased impaired * $46,099 $1,119 $47,442 $927         Purchased impaired loans with subsequent deterioration $138,789 5,237 $161,307 5,560Purchased impaired loans with no subsequent deterioration $10,244 — $344 —Total Reserves   $6,356   $6,487         Average impaired loans calculated using a simple average $46,771   $65,527  * Included at March 31, 2014 and December 31, 2013 were $12.5 million and $12.1 million, respectively, in restructured and performing loans.The following table presents loans held for investment on nonaccrual status by loan class for the dates indicated:(dollars in thousands)      March 31, 2014 December 31, 2013Loans held for investment:    Commercial and agricultural $450 $516Real estate - construction 3,437 4,677Real estate - mortgage:    1-4 family residential 10,151 11,580Commercial 19,533 18,380Consumer 32 12Total nonaccrual loans $33,603 $35,165Loans more than 90 days delinquent, still on accrual 355 —Total nonperforming loans $33,958 $35,165There were no loans held for sale on nonaccrual status as of March 31, 2014 or December 31, 2013.The following table presents individually reviewed impaired loans and purchased impaired loans with subsequent credit deterioration, segregated by portfolio segment, and the corresponding reserve for impaired loan losses as of March 31, 2014:    Unpaid  (dollars in thousands) Recorded Principal Related  Investment Balance AllowanceWith no related allowance recorded:        Commercial and agricultural $242 $485 $—  Real estate - construction 2,677 3,195 —  Real estate - mortgage:      1-4 family residential 9,064 11,740 —Commercial 21,334 25,856 —  Consumer — — —Total $33,317 $41,276 $—With an allowance recorded:        Commercial and agricultural $— $— $—  Real estate - construction 648 956 73  Real estate - mortgage:      1-4 family residential 3,920 4,207 561Commercial 3,544 4,555 485  Consumer — — —Total $8,112 $9,718 $1,119Total individually evaluated impaired loans        Commercial and agricultural $242 $485 $—  Real estate - construction 3,325 4,151 73  Real estate - mortgage:      1-4 family residential 12,984 15,947 561Commercial 24,878 30,411 485  Consumer — — —Total $41,429 $50,994 $1,119       PI loans with subsequent credit deterioration:        Commercial and agricultural $5,425 $4,278 $638  Real estate - construction 9,946 10,919 1,148  Real estate - mortgage:           1-4 family residential 16,031 17,460 390     Commercial 106,248 114,322 2,871  Consumer 1,139 737 190Total $138,789 $147,716 $5,237The following table presents individually reviewed impaired loans, and purchased impaired loans with subsequent credit deterioration, segregated by portfolio segment, and the corresponding reserve for impaired loan losses as of December 31, 2013:    Unpaid  (dollars in thousands) Recorded Principal Related  Investment Balance AllowanceWith no related allowance recorded:        Commercial and agricultural $398 $643 $—  Real estate - construction 4,734 8,893 —  Real estate - mortgage:      1-4 family residential 11,154 14,431 —Commercial 23,579 28,905 —  Consumer — — —Total $39,865 $52,872 $—With an allowance recorded:        Commercial and agricultural $— $— $—  Real estate - construction — — —  Real estate - mortgage:      1-4 family residential 2,965 3,032 927Commercial — — —  Consumer — — —Total $2,965 $3,032 $927Total individually evaluated impaired loans        Commercial and agricultural $398 $643 $—  Real estate - construction 4,734 8,893 —  Real estate - mortgage:      1-4 family residential 14,119 17,463 927Commercial 23,579 28,905 —  Consumer — — —Total $42,830 $55,904 $927PI loans with subsequent credit deterioration:        Commercial and agricultural $10,729 $10,344 $382  Real estate - construction 9,792 11,216 1,015  Real estate - mortgage:           1-4 family residential 26,628 28,143 724     Commercial 113,178 121,813 3,251  Consumer 980 785 188Total $161,307 $172,301 $5,560The following summary includes impaired loans individually reviewed.  Average recorded investment and interest income recognized on impaired loans, segregated by portfolio segment, is shown in the following tables as of March 31, 2014 and March 31, 2013:  For Three Months Ended For Three Months Ended  March 31, 2014 March 31, 2013  Average Interest Average Interest(dollars in thousands) Recorded Income Recorded Income  Investment Recognized Investment RecognizedWith no related allowance recorded:          Commercial and agricultural $242 $— $886 $—  Real estate - construction 2,688 10 9,233 —  Real estate - mortgage:        1-4 family residential 9,050 28 13,472 26Commercial 21,503 89 34,010 87  Consumer — — — —Total $33,483 $127 $57,601 $113With an allowance recorded:          Commercial and agricultural $— $— $917 $5  Real estate - construction 650 2 2,111 —  Real estate - mortgage:        1-4 family residential 3,829 19 4,666 8Commercial 3,552 30 8,663 4  Consumer — — — —Total $8,031 $51 $16,357 $17Total:          Commercial and agricultural $242 $— $1,803 $5  Real estate - construction 3,338 12 11,344 —  Real estate - mortgage:        1-4 family residential 12,879 47 18,138 34Commercial 25,055 119 42,673 91  Consumer — — — —Total $41,514 $178 $73,958 $130         Impaired loans also include loans for which we may elect to grant a concession, providing terms more favorable than those prevalent in the market (e.g., rate, amortization term), and formally restructure due to the weakening credit status of a borrower.  Restructuring is designed to facilitate a repayment plan that minimizes the potential losses that we otherwise may have to incur.  If these impaired loans are on nonaccruing status as of the date of restructuring, the loans are included in nonperforming loans.  Nonperforming restructured loans will remain as nonperforming until the borrower can demonstrate adherence to the restructured terms for a period of no less than six months and when it is otherwise determined that continued adherence is reasonably assured.  Some restructured loans continue as accruing loans after restructuring if the borrower is not past due at the time of restructuring, adequate collateral valuations support the restructured loans, and the cash flows of the underlying business appear adequate to support the restructured debt service.  Not included in nonperforming loans are loans that have been restructured that were performing as of the restructure date.  At March 31, 2014, there was $18.1 million in restructured loans, of which $12.5 million were accruing and in a performing status.  At December 31, 2013, there was $18.1 million in restructured loans, of which $12.1 million were accruing and in a performing status.                        Granite Purchased LoansGranite Purchased Loans include PI loans and PC loans.  PC loans include performing revolving consumer and commercial loans.PI loans are segregated into pools and recorded at estimated fair value on the date of acquisition without the carryover of the related ALL.  PI loans are accounted for under ASC 310-30 when the loans have evidence of credit deterioration since origination and it is probable at the date of acquisition we will not collect all contractually required principal and interest payments.  Evidence of credit quality deterioration as of the date of acquisition may include statistics such as past due status, nonaccrual status and risk grade.  PI loans generally meet our definition for nonaccrual status; however, even if the borrower is not currently making payments, we will classify loans as accruing if we can reasonably estimate the amount and timing of future cash flows.All Granite Purchased PI loans are presented on an accruing basis. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable difference.Periodically, we estimate the expected cash flows for each pool of the PI loans and evaluate whether the expected cash flows for each pool have changed from prior estimates.  Decreases to the expected cash flows will generally result in a provision for loan losses.  Subsequent increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges, or reclassification from nonaccretable difference to accretable yield with a positive impact on future interest income.  Excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan when there is a reasonable expectation about the amount and timing of such cash flows.  We have elected to account for the Granite Purchased PI loans under ASC 310-30 and the Granite Purchased PC loans under ASC 310-20.  At March 31, 2014, and December 31, 2013, our financial statements reflected a PI loan ALL of $5.2 million and $5.6 million, respectively, and an ALL for PC loans of $0.3 million and $0.3 million, respectively.The following table presents the balance of all Granite Purchased Loans:  At March 31, 2014(dollars in thousands) Purchased Impaired Purchased Contractual Total Purchased Loans UnpaidPrincipalBalanceCommercial and agricultural $9,722 $4,044 $13,766 $12,654Real estate - construction 11,200 — 11,200 12,218Real estate - mortgage:           1-4 family residential 20,399 25,041 45,440 47,829   Commercial 106,552 365 106,917 114,984Consumer 1,160 — 1,160 766       Total $149,033 $29,450 $178,483 $188,451  At December 31, 2013(dollars in thousands) Purchased Impaired Purchased Contractual TotalPurchased Loans UnpaidPrincipalBalanceCommercial and agricultural $10,729 $5,948 $16,677 $16,452Real estate - construction 9,892 — 9,892 11,368Real estate - mortgage:           1-4 family residential 26,854 22,127 48,981 51,359   Commercial 113,178 373 113,551 122,197Consumer 998 — 998 798       Total $161,651 $28,448 $190,099 $202,174The tables below include only those Granite Purchased Loans accounted for under the expected cash flow method (PI loans) for the periods indicated.  These tables do not include PC loans, including Granite Purchased PC loans or purchased performing residential mortgage loans.   For Three Months Ended For Three Months Ended  March 31, 2014 March 31, 2013  Purchased Impaired Purchased Impaired(dollars in thousands) Carrying Amount FutureAccretion Carrying Amount Future AccretionBalance, beginning of period $161,651 $29,987 $228,392 $30,299  Accretion 2,665 (2,665) 4,203 (4,203)  Increase in future accretion — 1,005 — —  Reclassification of loans and adjustments (4,180) — — —  Payments received (11,081) — (25,928) —  Foreclosed and transferred to OREO (22) — (783) —Subtotal before allowance 149,033 28,327 205,884 26,096Allowance for credit losses (5,237) — (5,373) —Net carrying amount, end of period $143,796 $28,327 $200,511 $26,096         Allowance for Loan LossesCOB's ALL, which is utilized to absorb actual losses in the loan portfolio, is maintained at a level consistent with management's best estimate of probable loan losses to be incurred as of the balance sheet date.  Management assesses COB's ALL quarterly.  This assessment includes a methodology that separates the total loan portfolio into homogeneous loan classifications for purposes of evaluating risk.  The required allowance is calculated by applying a risk adjusted reserve requirement to the dollar volume of loans within a homogenous group.  For purposes of the ALL, we have grouped our loans into pools according to the loan segmentation regime employed on schedule RC-C of the FFIEC's Consolidated Reports of Condition and Income.  Major loan portfolio subgroups include: risk graded commercial loans, mortgage loans, home equity loans, retail loans and retail credit lines.  Management also analyzes the loan portfolio on an ongoing basis to evaluate current risk levels, and risk grades are adjusted accordingly.  While management uses the best information available to make evaluations, future adjustments may be necessary, if economic or other conditions differ substantially from the assumptions used.Historical loss rates are calculated by associating losses to the risk-graded pool to which they relate for each of the previous eight quarters. Then, using a look back period consisting of the twenty most recent quarters, loss factors are calculated for each risk-graded pool using a simple average. This represents a change in methodology which began in the third quarter of 2013. Previously, we used a look back period beginning in the third quarter of 2006 and a weighted average of losses. The impact of this change was immaterial to the allowance calculation in the period we adopted the methodology change.In addition to our ability to use our own historical loss data and migration between risk grades, we have a rigorous process for computing the qualitative factors that impact the ALL.  A committee, independent of the historical loss migration team, reviews risk factors that may impact the ALL.  Some factors are statistically quantifiable, such as concentration, growth, delinquency, and nonaccrual risk by loan type, while other factors are qualitative in nature, such as staff competency, competition within our markets and economic and regulatory changes impacting the loans held for investment.We lend primarily in North Carolina.  As of March 31, 2014, a majority of the principal amount of the loans held for investment in our portfolio was to businesses and individuals in North Carolina.  This geographic concentration subjects the loan portfolio to the general economic conditions within this area.  The risks created by this concentration have been considered by management in the determination of the adequacy of the ALL.  Management believes the ALL is adequate to cover estimated losses on loans at each balance sheet date.During the three month period ended March 31, 2014, we charged off $2.0 million in loans and realized $1.9 million in recoveries, for $0.1 million of net charge-offs.  The majority of the loans charged off were loans that were previously impaired and had specific reserves assigned in prior periods.The ALL, as a percentage of loans held for investment, was 2.13% at March 31, 2014, compared to 2.66% at March 31, 2013.  At December 31, 2013, the ALL, as a percentage of loans held for investment, was 2.21%.An analysis of the changes in the ALL is as follows:  For Three Months Ended(dollars in thousands) March 31, 2014 March 31, 2013Balance, beginning of period $26,785 $29,314Provision for (recovery of) losses charged to continuing operations (684) 110Net recoveries (charge-offs):    Charge-offs (1,977) (3,010)Recoveries 1,915 3,227Net recoveries (charge-offs) (62) 217Balance, end of period $26,039 $29,641Annualized net charge-offs (recoveries) during the period to average loans 0.02% (0.08)%Annualized net charge-offs (recoveries) during the period to ALL 0.97% (2.93)%Allowance for loan losses to loans held for investment 2.13% 2.66 %The following table presents ALL activity by portfolio segment for the three months ended March 31, 2014:      Real Estate - Mortgage    (dollars in thousands) Commercial and Agricultural Real Estate - Construction 1-4 Family Residential Commercial Consumer Total            ALL:            Beginning balance $2,931 $5,233 $8,869 $7,195 $2,557 $26,785Charge-offs (389) (533) (484) (66) (505) (1,977)Recoveries 392 964 235 66 258 1,915Provision 507 (356) (697) (229) 91 (684)Ending balance $3,441 $5,308 $7,923 $6,966 $2,401 $26,039The following table presents ALL activity by portfolio segment for the three months ended March 31, 2013:      Real Estate - Mortgage    (dollars in thousands) Commercial and Agricultural Real Estate - Construction 1-4 Family Residential Commercial Consumer TotalALL:                        Beginning balance $3,238 $4,987 $8,701 $9,627 $2,761 $29,314Charge-offs (319) (344) (632) (891) (824) (3,010)Recoveries 278 796 185 932 1,036 3,227Provision 176 155 549 (377) (393) 110Ending balance $3,373 $5,594 $8,803 $9,291 $2,580 $29,641                          The following table details the recorded investment in loans related to each segment in the allowance for loan losses by portfolio segment and disaggregated on the basis of impairment evaluation methodology at March 31, 2014:      Real Estate - Mortgage    (dollars in thousands) Commercial and Agricultural Real Estate - Construction 1-4 Family Residential Commercial Consumer TotalALL:              Individually evaluated for impairment $— $73 $561 $485 $— $1,119  Collectively evaluated for impairment 2,803 4,087 6,972 3,610 2,211 19,683  PI loans evaluated for credit impairment 638 1,148 390 2,871 190 5,237  PI loans with no credit deterioration — — — — — —Total ALL $3,441 $5,308 $7,923 $6,966 $2,401 $26,039Loans held for investment              Individually evaluated for impairment $242 $3,326 $12,997 $24,878 $— $41,443  Collectively evaluated for impairment 66,014 52,778 598,378 264,680 47,459 1,029,309  PI loans with subsequent credit deterioration 5,425 9,946 16,031 106,248 1,139 138,789  PI loans with no credit deterioration 4,297 1,254 4,368 304 21 10,244Total loans $75,978 $67,304 $631,774 $396,110 $48,619 $1,219,785The following table details the recorded investment in loans related to each segment in the allowance for loan losses by portfolio segment and disaggregated on the basis of impairment evaluation methodology at December 31, 2013:       Real Estate - Mortgage    (dollars in thousands) Commercial and Agricultural Real Estate - Construction 1-4 Family Residential Commercial Consumer TotalALL:              Individually evaluated for impairment $— $— $927 $— $— $927  Collectively evaluated for impairment 2,549 4,218 7,218 3,944 2,369 20,298  PI loans evaluated for credit impairment 382 1,015 724 3,251 188 5,560  PI loans with no credit deterioration — — — — — —Total ALL $2,931 $5,233 $8,869 $7,195 $2,557 $26,785Loans held for investment              Individually evaluated for impairment $398 $4,734 $14,119 $23,579 $— $42,830  Collectively evaluated for impairment 61,125 49,457 595,135 258,167 43,883 1,007,767  PI loans with subsequent credit deterioration 10,729 9,792 26,628 113,178 980 161,307  PI loans with no credit deterioration — 100 225 — 19 344Total loans $72,252 $64,083 $636,107 $394,924 $44,882 $1,212,248Troubled Debt RestructuringThe following table presents a breakdown of troubled debt restructurings that were restructured during the three months ended March 31, 2014 and March 31, 2013, segregated by portfolio segment:  For Three Months Ended March 31, 2014 For Three Months Ended March 31, 2013    Pre-Modification Post-Modification   Pre-Modification Post-Modification    Outstanding Outstanding   Outstanding Outstanding(dollars in thousands) Number Recorded Recorded Number Recorded Recorded  of Loans Investment Investment of Loans Investment InvestmentCommercial and agricultural 1 $11 $11 — $— $—Real estate - construction — — — — — —Real estate - mortgage:               1-4 family residential 5 735 732 4 1,777 1,773   Commercial — — — 1 1,151 807Consumer — — — — — —    Total 6 $746 $743 5 $2,928 $2,580             During the three months ended March 31, 2014, we modified six loans that were considered to be troubled debt restructurings.  We extended the terms for two of these loans and both extended the terms and modified the interest rate for the four remaining loans. During the three months ended March 31, 2013, we modified five loans that were considered to be troubled debt restructurings.  We extended the terms and modified the interest rate for each of these loans.There were no loans restructured in the twelve months prior to March 31, 2014 that went into default during the three months ended March 31, 2014. There were also no loans restructured in the twelve months prior to March 31, 2013 that went into default during the three months ended March 31, 2013.In the determination of the ALL, management considers troubled debt restructurings and any subsequent defaults in these restructurings as impaired loans.  The amount of the impairment is measured using the present value of expected future cash flows discounted at the loan's effective interest rate, the observable market price of the loan, or the fair value of the collateral if the loan is collateral dependent.Unfunded CommitmentsThe reserve for unfunded commitments, which is included in other liabilities, is calculated by estimating the amount of additionalfunding on the commitment and multiplying that amount by the historical loss rate (including Q&E factors). The followingdescribes our method for determining the estimated additional funding by commitment type:•Straight Lines of Credit - Unfunded balance of line of credit (100% utilization)•Revolving Lines of Credit - Average Utilization (for the last 12 months) less Current Utilization•Letters of Credit - 10% utilizationThe reserve for unfunded commitments was $0.6 million as of March 31, 2014 and $0.5 million at December 31, 2013. |

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| - Definition
The entire disclosure for financing receivables. Examples of financing receivables include, but are not limited to, loans, trade accounts receivables, notes receivable, credit cards, and receivables relating to a lessor's right(s) to payment(s) from a lease other than an operating lease that is recognized as assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=32702940&loc=SL6953791-111525
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