| **Borrowings (Tables)**                  | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| **Debt Disclosure [Abstract]**           |                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Schedule of Debt                         | The following table summarizes the Corporation's borrowings as of December 31, 2012 and 2011:December 31, 2012December 31, 2011Federal Funds Purchased$18,862Securities Sold Under Repurchase Agreements141,828$156,305Federal Home Loan Bank Advances94,238138,095Subordinated Debentures and Term Loans112,161194,974Total Borrowings$367,089$489,374                                                                                                       |
| Schedule of Maturities of Long-term Debt | Maturities of securities sold under repurchase agreements; Federal Home Loan Bank Advances, subordinated debentures and term loans as of December 31, 2012, are as follows:Maturities in Years Ending December 31:Securities SoldUnder Repurchase AgreementsFederal HomeLoan BankAdvancesSubordinatedDebentures andTerm Loans2013$131,828$1,619$459201410,00026,506201530,98655,000201628,93320172,731After 20173,46356,702 $141,828$94,238$112,161 |

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| - Definition
Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.
+ References
No definition available.
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| - Definition
Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601
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