Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Board Authorized Purchase Program [Member]	Series E Preferred Stock	Series F Preferred Stock	Preferred Equity	Common Stock	Surplus	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss)	Treasury Stock, Common	Treasury Stock, Common Board Authorized Purchase Program [Member]	Treasury Stock, Common Performance/Service Based RSAs, RSA,
Beginning balance at Dec. 31, 2022	$ 4,015,490				$ 194,112	$ 1,752	$ 1,712,733	$ 2,904,882	$ (272,799)	$ (525,190)
Comprehensive income:
Net income	103,360							103,360
Net other comprehensive (loss) during period	39,211								39,211
Comprehensive income	142,571
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	1,766						(12,612)	0		14,379
Purchase of treasury stock,	(5,362)											$ (5,362)
Cash dividends:
Common stock	(32,013)							(32,013)
Preferred stock(a)	(2,875)							(2,875)
Stock-based compensation expense, net	6,086						6,086
Ending balance at Mar. 31, 2023	4,125,663				194,112	1,752	1,706,206	2,973,354	(233,588)	(516,173)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625
Beginning balance at Dec. 31, 2023	4,173,973				194,112	1,752	1,714,822	2,946,805	(171,096)	(512,421)
Comprehensive income:
Net income	81,169							81,169
Net other comprehensive (loss) during period	(38,785)								(38,785)
Comprehensive income	42,384
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	3,910						(13,839)			17,749
Purchase of treasury stock,	(4,572)	$ (18,289)									$ (18,289)	$ (4,572)
Cash dividends:
Common stock	(33,527)							(33,527)
Preferred stock(a)	(2,875)							(2,875)
Stock-based compensation expense, net	7,669						7,669
Ending balance at Mar. 31, 2024	$ 4,168,673				$ 194,112	$ 1,752	$ 1,708,652	$ 2,991,571	$ (209,881)	$ (517,533)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625