| **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, 2013 December 31, 2012Assets   Cash$13,228 $35,160Investment in Subsidiaries745,818 633,971Goodwill448 448Other Assets8,695 6,638Total Assets$768,189 $676,217Liabilities   Borrowings$126,702 $111,702Other Liabilities6,564 12,279Total Liabilities133,266 123,981Stockholders' Equity634,923 552,236Total Liabilities and Stockholders' Equity$768,189 $676,217Condensed Statements of Income and Comprehensive IncomeDecember 31, 2013December 31, 2012December 31, 2011IncomeDividends from Subsidiaries$63,732$30,096$4,677Other Income4585(11)Total Income63,77730,1814,666ExpensesInterest Expense3,5314,6557,661Salaries and Employee Benefits3,2843,1942,688Net Occupancy and Equipment Expenses25831231Telephone Expenses423021Postage and Courier Expenses12Other Expenses2,6171,5021,501Total Expenses9,7329,69411,904Income (Loss) Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries54,04520,487(7,238)Income Tax Benefit3,1533,3163,256Income (Loss) Before Equity in Undistributed Income of Subsidiaries57,19823,803(3,982)Equity in Undistributed (Distributions in Excess of) Income of Subsidiaries(12,668)21,31929,234Net Income 44,53045,12225,252Loss on CPP Unamortized Discount(1,401)Loss on Extinguishment of Trust Preferred Securities(10,857)Preferred Stock Dividends and Discount Accretion(2,380)(4,539)(3,981)Net Income Available to Common Stockholders$42,150$40,583$9,013      Net Income$44,530$45,122$25,252Other Comprehensive Income (Loss)(911)(1,897)6,555Comprehensive Income$43,619$43,225$31,807Condensed Statement of Cash Flows Year Ended December 31, 201320122011Operating Activities:   Net Income$44,530$45,122$25,252Adjustments to Reconcile Net Income to Net Cash:   Share-based Compensation778632524Distributions in Excess of (Equity in Undistributed) Income of Subsidiaries12,668(21,319)(29,234)Net Change in:   Other Assets(1,354)1,9025,747Other Liabilities(8,438)1,1221,091Investment in Subsidiaries - Operating Activities12,991(1,755)(6,593)Net Cash Provided (Used) by Operating Activities$61,175$25,704$(3,213)Investing Activities:Investment in Subsidiaries  $(126) $704Other$240    Net Cash Provided (Used) in Investing Activities$240$(126)$704Financing Activities:   Cash Dividends$(7,992)$(7,442)$(4,729)Repayment of Borrowings(55,000)(4,124)(46,400)Proceeds from issuance of long-term debt70,000    Preferred stock redemption under Capital Purchase Program(69,600)Preferred stock issued under Small Business Lending Fund90,783Preferred stock redemption under Small Business Lending Fund(90,783)    Repurchase of Common Stock Warrants under Capital Purchase Program(368)Common Stock Issued21,165Stock Issued Under Employee Benefit Plans479449669Stock Issued Under Dividend Reinvestment and Stock Purchase Plan32520289Stock Options Exercised11578 Stock Redeemed(491)(235)(126)Other298Net Cash Used by Financing Activities$(83,347)$(11,072)$(8,219)Net Change in Cash(21,932)14,506(10,728)Cash, Beginning of the Year35,16020,65431,382Cash, End of Year$13,228$35,160$20,654 |

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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 06 -Article 9Reference 2: 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=26873400&loc=d3e24072-122690Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 12Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Article 5Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 05 -Paragraph c -Article 7
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