Annual report pursuant to Section 13 and 15(d)

Schedule of Mortgage Servicing Rights Sensitivity Analysis of Fair Value (Details)

v3.8.0.1
Schedule of Mortgage Servicing Rights Sensitivity Analysis of Fair Value (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]    
Weighted average prepayment speed: 9.80% 9.20%
Impact on fair value of 10% adverse change $ (40,100) $ (25,012)
Impact on fair value of 20% adverse change $ (27,421) $ (48,602)
Weighted average delinquency: 1.70% 1.90%
Impact on fair value of 10% adverse change $ (4,274) $ (1,908)
Impact on fair value of 20% adverse change $ (8,875) $ (3,816)
Weighted average discount rate: 9.90% 9.40%
Impact on fair value of 10% adverse change $ (35,137) $ (23,590)
Impact on fair value of 20% adverse change $ (68,246) $ (45,861)