Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method Key Assumptions (Details) - Amortization method - Residential Mortgage - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Servicing Asset at Amortized Cost [Line Items]      
Constant prepayment rate (annualized), actual 8.40% 7.80%  
Constant prepayment rate (annualized), 10% adverse change $ (5,172)   $ (4,510)
Constant prepayment rate (annualized), 20% adverse change $ (10,038)   (8,763)
Spread over forward interest rate swap rates, actual 10.41% 11.73%  
Spread over forward interest rate swap rates, 10% adverse change $ (6,866)   (5,259)
Spread over forward interest rate swap rates, 20% adverse change $ (12,934)   $ (10,195)