Other Noninterest Income and Other Noninterest Expense - Summary of Other Noninterest Income and Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other noninterest income
Insurance revenue		$ 2,259
Bankcard fees	$ 2,213	1,884
Income from bank owned life insurance policies	1,152	935
Other	1,585	132
Total other noninterest income	4,950	5,210
Other noninterest expenses
Data processing expense	2,594	2,365
Software amortization	3,335	914
Consulting and professional fees	2,229	2,934
Loan related expenses	910	255
FDIC insurance	1,752	955
Communications	998	704
Advertising and public relations	781	341
Legal expenses	158	2,627
Other	8,181	5,108
Total other noninterest expenses	$ 20,938	$ 16,203