Annual report pursuant to Section 13 and 15(d)

LOAN SALES AND SECURITIZATIONS LOAN SALES AND SECURITIZATIONS - Automobile Loans (Details)

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LOAN SALES AND SECURITIZATIONS LOAN SALES AND SECURITIZATIONS - Automobile Loans (Details) - Automobile Loan - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Automobile loans securitized with servicing retained $ 750,000 $ 0 $ 0
Pretax gains resulting from above loan sales $ 5,333 $ 0 $ 0