Noninterest Income and Noninterest Expense (Components of Other Noninterest Income and Other Noninterest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other noninterest income:
Income from bank-owned life insurance	$ 18,330	$ 18,179	$ 14,946
Credit-related fees	11,001	11,255	11,399
Income from derivatives	13,477	12,814	12,958
Other miscellaneous income	31,993	14,137	15,228
Total other noninterest income	74,801	56,385	54,531
Other noninterest expense:
Advertising	12,441	13,011	15,251
Corporate value and franchise taxes	14,478	16,578	15,949
Entertainment and contributions	7,867	9,865	10,777
Telecommunication and postage	12,646	14,991	14,588
Printing and supplies	3,728	5,063	4,947
Travel expenses	2,697	2,297	5,278
Tax credit investment amortization	4,436	3,843	4,943
Other retirement expense	(27,941)	(25,133)	(16,561)
Loss on facilities and equipment from consolidation	13,863	3,012
Loss on extinguishment of debt	4,165
Other miscellaneous expense	32,829	23,778	37,282
Total other noninterest expense	$ 81,209	$ 67,305	$ 92,454