Quarterly report pursuant to Section 13 or 15(d)

Loans sales and securitizations (Details Textuals)

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Loans sales and securitizations (Details Textuals) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Loans sales and securitizations (Textuals) [Abstract]        
Expected potential automobile loan securitizaton, minimum $ 1,000,000,000   $ 1,000,000,000  
Expected potential automobile loan securitizaton, maximum 1,300,000,000   1,300,000,000  
Residential Mortgage [Member]
       
Loans sales and securitizations (Textuals) [Abstract]        
Total servicing fees included in mortgage banking income $ 12,400,000 $ 12,200,000 $ 25,000,000 $ 24,600,000