Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Expense Disclosure Nonoperating [Abstract]
Advertising	$ 3,080	$ 2,526
Corporate value and franchise taxes	4,042	3,440
Printing and supplies	1,169	1,286
Telecommunications and postage	3,466	3,850
Travel expense	1,098	1,066
Entertainment and contributions	2,708	2,518
Tax credit investment amortization	1,138	874
Other retirement expense	(4,105)	(4,463)
Other miscellaneous	5,691	5,684
Total other noninterest expense	$ 18,287	$ 16,781