Annual report pursuant to Section 13 and 15(d)

Fair Values of Assets and Liabilities (Details Textuals)

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Fair Values of Assets and Liabilities (Details Textuals) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2010
Asset-backed Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Municipal securities [Member]
Dec. 31, 2010
Level 3 [Member]
Automobile Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfer in of Level 3 Assets       $ 323,600,000 $ 791,400,000
Transfer out of Level 3 Assets     184,100,000    
Fair Values of Assets and Liabilities (Textuals) [Abstract]          
Mortgage loans held for sale, aggregate outstanding principal 328,641,000 749,982,000      
Federal Agencies: mortgage-backed securities transferred to held-to-maturity securities portfolio 469,100,000        
Impaired loans fair value based upon collateral value 129,000,000        
OREO assets, fair value $ 38,400,000