Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortization Method (Details)

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LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortization Method (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Fair value, end of period $ 159,467   $ 159,467   $ 189,237
Automobile Loan          
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Carrying value, beginning of period 7,029 $ 5,063 8,771 $ 6,898  
New servicing assets created 0 11,180 0 11,180  
Amortization and other (1,571) (1,913) (3,313) (3,748)  
Fair value, end of period 5,551 14,336 5,551 14,336  
Carrying value, end of period $ 5,458 $ 14,330 $ 5,458 $ 14,330  
Automobile Loan | Amortization method          
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Weighted-average life (years) 3 years 3 years 2 months 3 years 3 years 2 months