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Income Taxes (Schedule Of Computation Of Income Tax Expense Differed From The Amounts Computed By Applying Of Statutory Federal Income Tax Rate To Income/(Loss) Before Income Taxes) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Abstract]      
Federal income tax rate 35.00% 35.00% 35.00%
Tax computed at statutory rate $ 52,447 $ 18,114 $ (142,082)
State income taxes (2,542) (5,806) (8,895)
BOLI - cash surrender value (6,757) (9,671) (1,898)
Tax-exempt interest (3,732) (1,820) (802)
Tax credits (23,494) (23,788) (22,312)
Goodwill     3,205
Other (86) 1,789 2,068
Total income tax expense/(benefit) $ 15,836 $ (21,182) $ (170,716)