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Note 12 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (In thousands) |
Current: |  |  |  |  |  |  |  |  |
Federal |  | $ | 44,263 |  |  | $ | 26,548 |  |  | $ | 16,496 |
State |  |  | 17,081 |  |  |  | 10,905 |  |  |  | 7,379 |
|  | $ | 61,344 |  |  | $ | 37,453 |  |  | $ | 23,875 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 3,755 |  |  |  | 10,133 |  |  |  | (28,600 | )
State |  |  | 1,029 |  |  |  | 3,675 |  |  |  | (9,904 | )
|  | $ | 4,784 |  |  | $ | 13,808 |  |  | $ | (38,504 | )
Total income tax expense/(benefit |  | $ | 66,128 |  |  | $ | 51,261 |  |  | $ | (14,629 | )
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
Deferred Tax Assets |  |  |  |  |  |
Loan loss allowance, due to differences in computation of bad debts |  | $ | 100,774 |  |  | $ | 109,686 |
Write-down on equity securities |  |  | 3,374 |  |  |  | 3,609 |
Stock option compensation expense |  |  | 16,120 |  |  |  | 16,048 |
State tax |  |  | 4,479 |  |  |  | 3,744 |
Non-accrual interest |  |  | 3,208 |  |  |  | 2,048 |
Write-down on other real estate owned |  |  | 10,302 |  |  |  | 14,148 |
Accural for litigation |  |  | 2,415 |  |  |  | - |
Unrealized loss on interest rate swaps |  |  | - |  |  |  | 1,097 |
Unrealized loss on securities available-for-sale, net |  |  | - |  |  |  | 6,311 |
Other, net |  |  | 3,544 |  |  |  | 3,536 |
Gross deferred tax assets |  |  | 144,216 |  |  |  | 160,227 |
Deferred Tax Liabilities |  |  |  |  |  |  |  |
Core deposit intangibles |  |  | (1,632 | ) |  |  | (3,919 | )
Investment in aircraft financing trust and venture capital partnerships |  |  | (19,684 | ) |  |  | (21,628 | )
Unrealized gain on securities available-for-sale, net |  |  | (338 | ) |  |  | - |
Dividends on Federal Home Loan Bank common stock |  |  | (3,071 | ) |  |  | (2,788 | )
Other, net |  |  | (5,084 | ) |  |  | (5,646 | )
Gross deferred tax liabilities |  |  | (29,809 | ) |  |  | (33,981 | )
Valuation allowance |  |  | (2,125 | ) |  |  | (2,533 | )
Net deferred tax assets |  | $ | 112,282 |  |  | $ | 123,713 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (In thousands) |
Tax provision at Federal statutory rate |  | $ | 64,248 |  |  |  | 35.0 | % |  | $ | 52,994 |  |  |  | 35.0 | % |  | $ | (1,072 | ) |  |  | 35.0 | %
State income taxes, net of Federal income tax benefit |  |  | 11,772 |  |  |  | 6.4 |  |  |  | 9,477 |  |  |  | 6.3 |  |  |  | (1,641 | ) |  |  | 53.5 |
Interest on obligations of state and political subdivisions, which are exempt from Federal taxation |  |  | (1,456 | ) |  |  | (0.8 | ) |  |  | (1,476 | ) |  |  | (1.0 | ) |  |  | (299 | ) |  |  | 9.8 |
Low income housing and other tax credits |  |  | (9,353 | ) |  |  | (5.1 | ) |  |  | (10,087 | ) |  |  | (6.6 | ) |  |  | (11,220 | ) |  |  | 366.2 |
Other, net |  |  | 917 |  |  |  | 0.5 |  |  |  | 353 |  |  |  | 0.2 |  |  |  | (397 | ) |  |  | 13.0 |
Total income tax expense/(benefit) |  | $ | 66,128 |  |  |  | 36.0 | % |  | $ | 51,261 |  |  |  | 33.9 | % |  | $ | (14,629 | ) |  |  | 477.5 | %

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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