Other Noninterest Income and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Reporting threshold for other income and operating expenses (percent, greater than)	1.00%
NONINTEREST INCOME
Other service charges	$ 3,263	$ 2,982	$ 2,671
Increase in cash surrender value of corporate owned life insurance	1,818	2,196	2,106
Net gain on sale of loans	458	50	95
Gain (loss) on sale of fixed assets	2,954	30	(7)
Other miscellaneous income	4,637	2,373	1,426
Total other noninterest income	13,130	7,631	6,291
NONINTEREST EXPENSES
Marketing expense	5,495	5,013	5,087
Professional fees	8,564	5,725	5,446
Technology expense	10,099	8,332	7,011
Cardholder expense	3,277	3,391	2,503
Other miscellaneous expenses	20,868	20,537	17,187
Total other noninterest expenses	$ 48,303	$ 42,998	$ 37,234