Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Noninterest Expense [Abstract]
Advertising	$ 2,553	$ 3,910	$ 8,596	$ 11,971
Corporate value and franchise taxes	3,718	3,387	10,735	9,942
Printing and supplies	1,287	1,421	4,261	3,929
Travel expense	1,365	1,226	3,872	3,635
Entertainment and contributions	2,539	2,322	8,250	6,087
Tax credit investment amortization	1,560	1,212	3,309	3,637
FDIC loss share agreement termination				6,603
Other retirement expense	(4,664)	(4,402)	(13,585)	(10,850)
Loss on restructuring of bank-owned life insurance contracts			3,240
Other miscellaneous	6,297	8,282	20,811	22,253
Total other noninterest expense	$ 14,655	$ 17,358	$ 49,489	$ 57,207