| **Condensed Financial Information (parent company only)**                        | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| **Condensed Financial Information of Parent Company Only Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| Condensed Financial Information (parent company only)                            | CONDENSED FINANCIAL INFORMATION (parent company only)Presented below is condensed financial information as to financial position, results of operations, and cash flows of the Corporation. Condensed Balance Sheets December 31, 2012 December 31, 2011Assets   Cash$35,160 $20,654Investment in Subsidiaries633,971 611,809Goodwill448 448Other Assets6,638 8,540Total Assets$676,217 $641,451Liabilities   Borrowings$111,702 $115,826Other Liabilities12,279 11,158Total Liabilities123,981 126,984Stockholders' Equity552,236 514,467Total Liabilities and Stockholders' Equity$676,217 $641,451Condensed Statements of Income and Comprehensive IncomeDecember 31, 2012December 31, 2011December 31, 2010IncomeDividends from Subsidiaries$30,096$4,677$3,256Administrative Services Fees from Subsidiaries28,489Other Income85(11)190Total Income30,1814,66631,935ExpensesInterest Expense4,6557,6616,816Salaries and Employee Benefits3,1942,68825,884Net Occupancy and Equipment Expenses312316,213Telephone Expenses3021918Postage and Courier Expenses121,786Other Expenses1,5021,5015,382Total Expenses9,69411,90446,999Income (Loss) Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries20,487(7,238)(15,064)Income Tax Benefit3,3163,2565,970Income (Loss) Before Equity in Undistributed Income of Subsidiaries23,803(3,982)(9,094)Equity in Undistributed (Distributions in Excess of) Income of Subsidiaries21,31929,23416,003Net Income 45,12225,2526,909Gain on Exchange of Preferred Stock11,353Loss on CPP Unamortized Discount(1,401)(1,301)Loss on Extinguishment of Trust Preferred Securities(10,857)Preferred Stock Dividends and Discount Accretion(4,539)(3,981)(5,239)Net Income Available to Common Stockholders$40,583$9,013$11,722      Net Income$45,122$25,252$6,909Other Comprehensive Income(1,897)6,555(1,331)Comprehensive Income$43,225$31,807$5,578Condensed Statement of Cash Flows Year Ended December 31, 201220112010Operating Activities:   Net Income$45,122$25,252$6,909Adjustments to Reconcile Net Income to Net Cash   Provided by Operating Activities   Share-based Compensation6325241,750Tax Benefit from Share Based Compensation 50Distributions in Excess of (Equity in Undistributed) Income of Subsidiaries(21,319)(29,234)(16,003)Net Change in:   Other Assets1,9025,7473,309Other Liabilities1,1221,091(744)Investment in Subsidiaries - Operating Activities(1,755)(6,593)(20)Net Cash Provided (Used) by Operating Activities$25,704$(3,213)$(4,749)Investing Activities - Investment in Subsidiaries(126)704(12,500)Net Cash Provided (Used) in Investing Activities$(126)$704$(12,500)Financing Activities:   Cash Dividends$(7,442)$(4,729)$(5,920)Repayment of Borrowings(4,124)(46,400) Preferred stock redemption under Capital Purchase Program(69,600) Preferred stock issued under Small Business Lending Fund90,783 Repurchase of Common Stock Warrants under Capital Purchase Program(368) Common Stock Issued21,16524,150Stock Issued Under Employee Benefit Plans449669582Stock Issued Under Dividend Reinvestment and Stock Purchase Plan2028991Stock Options Exercised78  Tax Benefit from Share Based Compensation  (50)Stock Redeemed(235)(126)(76)Other298198Net Cash Provided (Used) by Financing Activities$(11,072)$(8,219)$18,975Net Change in Cash14,506(10,728)1,726Cash, Beginning of the Year20,65431,38229,656Cash, End of Year$35,160$20,654$31,382 |

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| - Definition
The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Article 5Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 12Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 06 -Article 9Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 05 -Paragraph c -Article 7Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7656940&loc=d3e5283-111683Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24072-122690Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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