Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method Key Assumptions (Details)

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method Key Assumptions (Details) - Amortization method - Residential Mortgage - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Servicing Asset at Amortized Cost [Line Items]      
Constant prepayment rate (annualized), actual 8.20% 7.80%  
Constant prepayment rate (annualized), 10% adverse change $ (4,731)   $ (4,510)
Constant prepayment rate (annualized), 20% adverse change $ (9,191)   (8,763)
Spread over forward interest rate swap rates, actual 10.84% 11.73%  
Spread over forward interest rate swap rates, 10% adverse change $ (6,566)   (5,259)
Spread over forward interest rate swap rates, 20% adverse change $ (12,374)   $ (10,195)