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
Other Comprehensive Income (Loss), Net of Tax	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)
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	190,514							190,514
Other Comprehensive Income (Loss), Net of Tax	(18,843)								(18,843)
Comprehensive income	171,671
Ending balance at Jun. 30, 2023	4,122,874				194,112	1,752	1,708,303	3,025,637	(291,642)	(515,287)
Beginning balance at Mar. 31, 2023	4,125,663				194,112	1,752	1,706,206	2,973,354	(233,588)	(516,173)
Comprehensive income:
Net income	87,154							87,154
Other Comprehensive Income (Loss), Net of Tax	(58,054)								(58,054)
Comprehensive income	29,100
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	93						(1,677)	0		1,770
Purchase of treasury stock,	(884)											(884)
Cash dividends:
Common stock	(31,996)							(31,996)
Preferred stock(a)	(2,875)							(2,875)
Stock-based compensation expense, net	3,773						3,773
Ending balance at Jun. 30, 2023	4,122,874				194,112	1,752	1,708,303	3,025,637	(291,642)	(515,287)
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
Other Comprehensive Income (Loss), Net of Tax	(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)
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	196,742							196,742
Other Comprehensive Income (Loss), Net of Tax	(48,117)								(48,117)
Comprehensive income	148,625
Ending balance at Jun. 30, 2024	4,242,337				194,112	1,752	1,711,316	3,070,762	(219,214)	(516,391)
Beginning balance at Mar. 31, 2024	4,168,673				194,112	1,752	1,708,652	2,991,571	(209,881)	(517,533)
Comprehensive income:
Net income	115,573							115,573
Other Comprehensive Income (Loss), Net of Tax	(9,333)								(9,333)
Comprehensive income	106,241
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	526						(1,704)			2,230
Purchase of treasury stock,	(1,088)											$ (1,088)
Cash dividends:
Common stock	(33,507)							(33,507)
Preferred stock(a)	(2,875)							(2,875)
Stock-based compensation expense, net	4,368						4,368
Ending balance at Jun. 30, 2024	$ 4,242,337				$ 194,112	$ 1,752	$ 1,711,316	$ 3,070,762	$ (219,214)	$ (516,391)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625