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 3 Months Ended 6 Months Ended 3 Months Ended
Mar. 31, 2014
Jun. 30, 2013
Sep. 30, 2012
Jun. 30, 2014
Residential Mortgage [Member]
Jun. 30, 2013
Residential Mortgage [Member]
Jun. 30, 2014
Residential Mortgage [Member]
Jun. 30, 2013
Residential Mortgage [Member]
Dec. 31, 2013
Residential Mortgage [Member]
Jun. 30, 2014
Automobile Loan [Member]
Jun. 30, 2013
Automobile Loan [Member]
Jun. 30, 2014
Automobile Loan [Member]
Jun. 30, 2013
Automobile Loan [Member]
Dec. 31, 2013
Automobile Loan [Member]
Jun. 30, 2014
Small Business Association (SBA) Loan [Member]
Jun. 30, 2013
Small Business Association (SBA) Loan [Member]
Dec. 31, 2013
Small Business Association (SBA) Loan [Member]
Loans sales and securitizations (Textuals) [Abstract]                                
Servicing income       $ 10,900,000 $ 10,900,000 $ 21,800,000 $ 22,100,000   $ 2,000,000 $ 2,600,000 $ 4,100,000 $ 5,400,000   $ 1,800,000 $ 1,600,000  
Total of automobile loans transferred in securitization transactions (not used) 1,000,000,000 1,300,000,000 1,000,000,000                          
Unpaid principal balance of third party serviced loans       $ 15,600,000,000   $ 15,600,000,000   $ 15,200,000,000 $ 1,200,000,000   $ 1,200,000,000   $ 1,600,000,000 $ 1,041,000,000   $ 885,400,000