| **Condensed Financial Information (parent company only) - Statement of Operations (Details) (USD $)In Thousands, unless otherwise specified** | 3 Months Ended | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Income**                                                                                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Other income                                                                                                                                  |           |            |   |   |   |   |   |   | $ 4,197 | $ 1,808 | $ 1,761 |
| **Expenses**                                                                                                                                  |           |            |   |   |   |   |   |   |   |   |   |
| Interest Expense                                                                                                                              | 4,572          | 3,714           | 4,003 | 4,280 | 4,699 | 5,445 | 6,116 | 7,353 | 16,569 | 23,613 | 37,890 |
| Salaries and Employee Benefits                                                                                                                |           |            |   |   |   |   |   |   | 85,413 | 79,398 | 74,735 |
| Other expenses                                                                                                                                |           |            |   |   |   |   |   |   | 11,142 | 11,505 | 10,475 |
| INCOME BEFORE INCOME TAX                                                                                                                      | 14,634         | 13,070          | 14,970 | 16,533 | 13,463 | 15,162 | 12,493 | 19,871 | 59,207 | 60,989 | 33,907 |
| Income Tax Benefit                                                                                                                            | (3,187)        | (2,667)         | (4,155) | (4,668) | (3,153) | (3,926) | (3,288) | (5,500) | (14,677) | (15,867) | (8,655) |
| Loss on CPP unamortized discount                                                                                                              |           |            |   |   |   |   |   |   |   |   | (1,401) |
| Loss on extinguishment of trust preferred securities                                                                                          |           |            |   |   |   |   |   |   |   |   | (10,857) |
| Preferred stock dividends and discount accretion                                                                                              | (241)          | (430)           | (852) | (857) | (1,135) | (1,134) | (1,135) | (1,135) | (2,380) | (4,539) | (3,981) |
| NET INCOME AVAILABLE TO COMMON STOCKHOLDERS                                                                                                   | 11,206         | 9,973           | 9,963 | 11,008 | 9,175 | 10,102 | 8,070 | 13,236 | 42,150 | 40,583 | 9,013 |
| Net income                                                                                                                                    | 11,447         | 10,403          | 10,815 | 11,865 | 10,310 | 11,236 | 9,205 | 14,371 | 44,530 | 45,122 | 25,252 |
| Other Comprehensive Income (Loss)                                                                                                             |           |            |   |   |   |   |   |   | (911) | (1,897) | 6,555 |
| Comprehensive income                                                                                                                          |           |            |   |   |   |   |   |   | 43,619 | 43,225 | 31,807 |
| Parent [Member]                                                                                                                               |           |            |   |   |   |   |   |   |   |   |   |
| **Income**                                                                                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Dividends from Subsidiaries                                                                                                                   |           |            |   |   |   |   |   |   | 63,732 | 30,096 | 4,677 |
| Other income                                                                                                                                  |           |            |   |   |   |   |   |   | 45 | 85 | (11) |
| Total Income                                                                                                                                  |           |            |   |   |   |   |   |   | 63,777 | 30,181 | 4,666 |
| **Expenses**                                                                                                                                  |           |            |   |   |   |   |   |   |   |   |   |
| Interest Expense                                                                                                                              |           |            |   |   |   |   |   |   | 3,531 | 4,655 | 7,661 |
| Salaries and Employee Benefits                                                                                                                |           |            |   |   |   |   |   |   | 3,284 | 3,194 | 2,688 |
| Net Occupancy and Equipment Expenses                                                                                                          |           |            |   |   |   |   |   |   | 258 | 312 | 31 |
| Telephone Expenses                                                                                                                            |           |            |   |   |   |   |   |   | 42 | 30 | 21 |
| Postage and Courier Expenses                                                                                                                  |           |            |   |   |   |   |   |   |    | 1 | 2 |
| Other expenses                                                                                                                                |           |            |   |   |   |   |   |   | 2,617 | 1,502 | 1,501 |
| Total Expenses                                                                                                                                |           |            |   |   |   |   |   |   | 9,732 | 9,694 | 11,904 |
| INCOME BEFORE INCOME TAX                                                                                                                      |           |            |   |   |   |   |   |   | 54,045 | 20,487 | (7,238) |
| Income Tax Benefit                                                                                                                            |           |            |   |   |   |   |   |   | 3,153 | 3,316 | 3,256 |
| Income (Loss) Before Equity in Undistributed Income of Subsidiaries                                                                           |           |            |   |   |   |   |   |   | 57,198 | 23,803 | (3,982) |
| Equity in Undistributed (Distributions in Excess of) Income of Subsidiaries                                                                   |           |            |   |   |   |   |   |   | (12,668) | 21,319 | 29,234 |
| Net Income                                                                                                                                    |           |            |   |   |   |   |   |   | 44,530 | 45,122 | 25,252 |
| Loss 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 | 25,252 |
| Other Comprehensive Income (Loss)                                                                                                             |           |            |   |   |   |   |   |   | (911) | (1,897) | 6,555 |
| Comprehensive income                                                                                                                          |           |            |   |   |   |   |   |   | $ 43,619 | $ 43,225 | $ 31,807 |

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Income (Loss) From Continuing Operations Before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest, After tax
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(Income) Loss From Subsidiaries, Net of Dividends and Tax
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Interest And Dividend Income, Operating and Noninterest Income
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Loss on CPP unamortized discount.
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Loss On Extinguishment Of Trust Preferred Securities
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The amount of expense incurred in the period for communication, which is the exchange of information by several methods.
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| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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The portion of profit or loss for the period which is attributable to the parent.
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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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Amount of the cost of borrowed funds accounted for as interest expense.
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The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense.
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).
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Represents other forms of revenue earned, excluding interest, which is not otherwise specified in the taxonomy.
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Amount after tax and reclassification adjustments of other comprehensive income (loss).
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Other noninterest expenses that are not separately presented in any other noninterest expense category.
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Amount of expense associated with postage.
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The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders.
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