Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortization Method Assumptions (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Automobile | Sensitivity Analysis Amortization Carrying Method    
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]    
Spread over forward interest rate swap rates 0.00% 5.00%