Condensed Parent Company Financial Statements (Statements Of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income
Other (losses) income	$ 160,600	$ 95,286	$ 99,634
Expenses
Interest expense	252,081	150,527	253,113
Salaries and employee benefits	696,107	691,669	626,076
(Loss) income before income taxes and equity in undistributed income of subsidiaries	700,555	637,796	389,781
Income tax benefit	(190,873)	(171,645)	(96,791)
Net income	509,682	466,151	292,990
Reportable Legal Entities | Parent Company
Income
Dividends and other revenue from subsidiaries	120,151	211,774	317,839
Other (losses) income	(12,969)	2,763	(1,890)
Total income	107,182	214,537	315,949
Expenses
Interest expense	36,522	38,293	39,581
Salaries and employee benefits	138,466	109,142	75,179
Other expenses	155,744	139,816	113,886
Total expenses	330,732	287,251	228,646
(Loss) income before income taxes and equity in undistributed income of subsidiaries	(223,550)	(72,714)	87,303
Income tax benefit	70,490	56,529	42,745
(Loss) income before equity in undistributed net income of subsidiaries	(153,060)	(16,185)	130,048
Equity in undistributed net income of subsidiaries	662,742	482,336	162,942
Net income	$ 509,682	$ 466,151	$ 292,990