Securities - Summary of AFS Securities Portfolio (Details) - USD ($) $ in Thousands |
Sep. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Schedule Of Available For Sale Securities [Line Items] | ||
| Amortized cost | $ 357,552 | $ 136,740 |
| Gross Unrealized gains | 3,195 | 1,881 |
| Gross Unrealized losses | (188) | (351) |
| Securities available-for-sale (“AFS”) | 360,559 | 138,270 |
| U.S. Treasury Securities | ||
| Schedule Of Available For Sale Securities [Line Items] | ||
| Amortized cost | 300 | 300 |
| Securities available-for-sale (“AFS”) | 300 | 300 |
| FNMA and FHLB Agency Notes | ||
| Schedule Of Available For Sale Securities [Line Items] | ||
| Amortized cost | 16,167 | 10,496 |
| Gross Unrealized gains | 69 | |
| Gross Unrealized losses | (219) | |
| Securities available-for-sale (“AFS”) | 16,236 | 10,277 |
| Agency Mortgage-backed Securities | ||
| Schedule Of Available For Sale Securities [Line Items] | ||
| Amortized cost | 341,085 | 125,944 |
| Gross Unrealized gains | 3,126 | 1,881 |
| Gross Unrealized losses | (188) | (132) |
| Securities available-for-sale (“AFS”) | $ 344,023 | $ 127,693 |