Segment Reporting - Key Operating Results of Business Segments (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Segment Reporting Information [Line Items] | |||||
| Interest income | $ 26,004 | $ 17,108 | $ 72,275 | $ 45,259 | |
| Interest expense | 2,841 | 1,647 | 7,830 | 4,503 | |
| Net interest income | 23,163 | 15,461 | 64,445 | 40,756 | |
| Provision for loan losses | 1,231 | 570 | 2,881 | 1,473 | $ 2,673 |
| Noninterest income | 15,079 | 6,868 | 26,974 | 19,492 | |
| Noninterest expense | 21,536 | 16,956 | 60,803 | 44,288 | |
| Income before taxes on income | 15,475 | 4,803 | 27,735 | 14,487 | |
| Operating Segments | Banking | |||||
| Segment Reporting Information [Line Items] | |||||
| Interest income | 26,004 | 17,108 | 72,275 | 45,259 | |
| Interest expense | 2,841 | 1,509 | 7,830 | 3,829 | |
| Net interest income | 23,163 | 15,599 | 64,445 | 41,430 | |
| Provision for loan losses | 1,231 | 570 | 2,881 | 1,473 | |
| Noninterest income | 9,923 | 1,839 | 11,505 | 4,501 | |
| Noninterest expense | 16,134 | 11,653 | 43,746 | 28,138 | |
| Income before taxes on income | 15,721 | 5,215 | 29,323 | 16,320 | |
| Operating Segments | Wealth Management | |||||
| Segment Reporting Information [Line Items] | |||||
| Noninterest income | 5,319 | 5,171 | 15,917 | 15,426 | |
| Noninterest expense | 4,697 | 4,685 | 14,536 | 13,950 | |
| Income before taxes on income | 622 | 486 | 1,381 | 1,476 | |
| Other | |||||
| Segment Reporting Information [Line Items] | |||||
| Interest expense | 138 | 674 | |||
| Net interest income | (138) | (674) | |||
| Noninterest income | (163) | (142) | (448) | (435) | |
| Noninterest expense | 705 | 618 | 2,521 | 2,200 | |
| Income before taxes on income | $ (868) | $ (898) | $ (2,969) | $ (3,309) | |