|**Other Real Estate Owned and Property Acquired in Settlement of Loans (Tables)** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
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|**Repossessed Assets [Abstract]**                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Schedule of Repossessed Assets                                                    | The following table summarizes real estate acquired in settlement of loans and personal property acquired in settlement of loans, the latter of which is included within the other assets financial statement line item on the Consolidated Balance Sheet at the dates indicated.(dollars in thousands)December 31, 2012December 31, 2011Real estate acquired in settlement of loans$62,796$110,009Personal property acquired in settlement of loans335377Total property acquired in settlement of loans$63,131$110,386                                                                                                              
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|(dollars in thousands)                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Real estate acquired in settlement of loans                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Personal property acquired in settlement of loans                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Total property acquired in settlement of loans                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Activities of Real Estate Acquired through Foreclosure                            | The following table summarizes the changes in real estate acquired in settlement of loans at the periods indicated.For Twelve Months Ended(dollars in thousands)December 31, 2012December 31, 2011Real estate acquired in settlement of loans, beginning of period$110,009$62,058Plus: New real estate acquired in settlement of loans32,565132,546Plus: Real estate acquired in BOGC acquisition—18,436Less: Sales of real estate acquired in settlement of loans(57,991)(58,782)Less: Write-downs and net loss on sales charged to expense(21,787)(44,249)Real estate acquired in settlement of loans, end of period$62,796$110,009
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|(dollars in thousands)                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Real estate acquired in settlement of loans, beginning of period                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Plus: New real estate acquired in settlement of loans                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Plus: Real estate acquired in BOGC acquisition                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Less: Sales of real estate acquired in settlement of loans                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Less: Write-downs and net loss on sales charged to expense                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Real estate acquired in settlement of loans, end of period                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

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