v3.8.0.1
Segment Reporting - Key Operating Results of Business Segments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Segment Reporting Information [Line Items]          
Interest income $ 34,878 $ 26,004 $ 98,890 $ 72,275  
Interest expense 6,438 2,841 16,497 7,830  
Net interest income 28,440 23,163 82,393 64,445  
Provision for loan losses 701 1,231 1,862 2,881 $ 4,681
Noninterest income 9,863 15,079 27,343 26,974  
Noninterest expense 23,393 21,536 70,315 60,803  
Income before taxes on income 14,209 15,475 37,559 27,735  
Operating Segments | Banking          
Segment Reporting Information [Line Items]          
Interest income 34,877 26,004 98,889 72,275  
Interest expense 6,210 2,841 16,062 7,830  
Net interest income 28,667 23,163 82,827 64,445  
Provision for loan losses 701 1,231 1,862 2,881  
Noninterest income 3,955 9,923 10,636 11,505  
Noninterest expense 17,333 16,134 51,506 43,746  
Income before taxes on income 14,588 15,721 40,095 29,323  
Operating Segments | Wealth Management          
Segment Reporting Information [Line Items]          
Interest income 1   1    
Net interest income 1   1    
Noninterest income 6,132 5,319 17,334 15,917  
Noninterest expense 5,096 4,697 15,328 14,536  
Income before taxes on income 1,037 622 2,007 1,381  
Other          
Segment Reporting Information [Line Items]          
Interest expense 228   435    
Net interest income (228)   (435)    
Noninterest income (224) (163) (627) (448)  
Noninterest expense 964 705 3,481 2,521  
Income before taxes on income $ (1,416) $ (868) $ (4,543) $ (2,969)