v3.5.0.2
Securities - Summary of AFS Securities Portfolio (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Schedule Of Available For Sale Securities [Line Items]    
Amortized cost $ 534,038 $ 567,351
Gross Unrealized gains 9,870 1,385
Gross Unrealized losses (1,205) (3,601)
Estimated Fair Value 542,703 565,135
U.S. Treasury Securities    
Schedule Of Available For Sale Securities [Line Items]    
Amortized cost 300 300
Estimated Fair Value 300 300
FNMA and FHLB Agency Notes    
Schedule Of Available For Sale Securities [Line Items]    
Amortized cost   16,108
Gross Unrealized losses   (95)
Estimated Fair Value   16,013
Agency Mortgage-backed Securities    
Schedule Of Available For Sale Securities [Line Items]    
Amortized cost 489,233 538,269
Gross Unrealized gains 9,749 909
Gross Unrealized losses (96) (3,030)
Estimated Fair Value 498,886 536,148
Beneficial interests in FHLMC securitization    
Schedule Of Available For Sale Securities [Line Items]    
Amortized cost 44,505 12,674
Gross Unrealized gains 121 476
Gross Unrealized losses (1,109) (476)
Estimated Fair Value $ 43,517 $ 12,674