v3.8.0.1
Segment Reporting - Key Operating Results of Business Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]                              
Interest income $ 37,911 $ 34,878 $ 33,652 $ 30,360 $ 28,367 $ 26,004 $ 24,573 $ 21,698 $ 19,212 $ 17,108 $ 14,993 $ 13,158 $ 136,801 $ 100,642 $ 64,471
Interest expense 6,686 6,438 5,757 4,302 3,363 2,841 2,652 2,337 1,778 1,647 1,569 1,287 23,183 11,193 6,281
Net interest income 31,225 28,440 27,895 26,058 25,004 23,163 21,921 19,361 17,434 15,461 13,424 11,871 113,618 89,449 58,190
Provision for loan losses 900 701 1,092 69 1,800 1,231 1,250 400 1,200 570 753 150 2,762 4,681 2,673
Noninterest income 11,376 9,863 9,697 7,783 7,586 15,079 4,910 6,985 9,281 6,868 6,420 6,204 38,719 34,560 28,773
Noninterest expense 28,661 23,393 22,213 24,709 20,191 21,536 19,850 19,417 17,170 16,956 13,974 13,358 98,976 80,994 61,458
Income before taxes on income $ 13,040 $ 14,209 $ 14,287 $ 9,063 $ 10,599 $ 15,475 $ 5,731 $ 6,529 $ 8,345 $ 4,803 $ 5,117 $ 4,567 50,599 38,334 22,832
Operating Segments | Banking                              
Segment Reporting Information [Line Items]                              
Interest income                         136,801 100,642 64,471
Interest expense                         22,530 11,193 5,607
Net interest income                         114,271 89,449 58,864
Provision for loan losses                         2,762 4,681 2,673
Noninterest income                         16,016 13,832 8,833
Noninterest expense                         73,990 58,422 39,982
Income before taxes on income                         53,535 40,178 25,042
Operating Segments | Wealth Management                              
Segment Reporting Information [Line Items]                              
Noninterest income                         23,556 21,348 20,530
Noninterest expense                         20,469 19,232 18,352
Income before taxes on income                         3,087 2,116 2,178
Other                              
Segment Reporting Information [Line Items]                              
Interest expense                         653   674
Net interest income                         (653)   (674)
Noninterest income                         (853) (620) (590)
Noninterest expense                         4,517 3,340 3,124
Income before taxes on income                         $ (6,023) $ (3,960) $ (4,388)