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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Fair value, end of period $ 180,938   $ 180,938   $ 189,237
Automobile          
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Carrying value, beginning of period 5,458 $ 14,330 8,771 $ 6,898  
New servicing assets created 0 0 0 11,180  
Amortization and other (1,087) (2,990) (4,400) (6,738)  
Fair value, end of period 4,366 11,341 4,366 11,341  
Carrying value, end of period $ 4,371 $ 11,340 $ 4,371 $ 11,340  
Automobile | Amortization method          
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Weighted-average life (years) 3 years 2 months 3 years 4 months 3 years 2 months 3 years 4 months