Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Expense Disclosure Nonoperating [Abstract]
Corporate value and franchise taxes	$ 3,414	$ 4,872	$ 11,300	$ 13,649
Telecommunications and postage	3,087	4,043	9,568	11,483
Advertising	3,638	3,159	8,400	10,089
Entertainment and contributions	2,280	1,315	5,214	7,146
Tax credit investment amortization	1,112	961	3,337	2,882
Printing and supplies	914	1,271	2,833	4,006
Travel expense	765	309	1,789	1,816
Net other retirement expense	(7,294)	(6,337)	(20,645)	(18,796)
Loss on facilities and equipment from consolidation			15,462	929
Loss on extinguishment of debt			4,165
Other miscellaneous	13,041	5,105	25,567	16,822
Total other noninterest expense	$ 20,957	$ 14,698	$ 66,990	$ 50,026