Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock Preferred Series A Stock	Preferred Stock Preferred Series B Stock	Common Stock	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Balance at Beginning of Period at Dec. 31, 2022	$ 1,316,995	$ 180,000		$ 582	$ 620,578	$ (434,658)	$ 2,055,912	$ (1,105,419)
Beginning Balance (in shares) at Dec. 31, 2022		180,000		39,835,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	140,806						140,806
Other Comprehensive Income (Loss)	(6,953)					(6,953)
Share-Based Compensation	11,979				11,979
Common Stock Issued under Purchase and Equity Compensation Plans	4,801			$ 1	(132)		1,716	3,216
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				121,040
Common Stock Repurchased	(14,056)							(14,056)
Common Stock Repurchased (in shares)				(208,090)
Cash Dividends Declared Common Stock (per share)	(83,824)						(83,824)
Cash Dividends Declared Preferred Stock	(5,908)						(5,908)
Balance at End of Period at Sep. 30, 2023	1,363,840	$ 180,000		$ 583	632,425	(441,611)	2,108,702	(1,116,259)
Ending Balance (in shares) at Sep. 30, 2023		180,000		39,748,700
Balance at Beginning of Period at Jun. 30, 2023	1,358,279	$ 180,000		$ 583	628,202	(423,431)	2,091,289	(1,118,364)
Beginning Balance (in shares) at Jun. 30, 2023		180,000		39,725,348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	47,903						47,903
Other Comprehensive Income (Loss)	(18,180)					(18,180)
Share-Based Compensation	4,307				4,307
Common Stock Issued under Purchase and Equity Compensation Plans	1,575				(84)		(571)	2,230
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				26,275
Common Stock Repurchased	(125)							(125)
Common Stock Repurchased (in shares)				(2,923)
Cash Dividends Declared Common Stock (per share)	(27,950)						(27,950)
Cash Dividends Declared Preferred Stock	(1,969)						(1,969)
Balance at End of Period at Sep. 30, 2023	1,363,840	$ 180,000		$ 583	632,425	(441,611)	2,108,702	(1,116,259)
Ending Balance (in shares) at Sep. 30, 2023		180,000		39,748,700
Balance at Beginning of Period at Dec. 31, 2023	1,414,242	$ 180,000		$ 583	636,422	(396,688)	2,107,569	(1,113,644)
Beginning Balance (in shares) at Dec. 31, 2023		180,000		39,753,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	110,832						110,832
Other Comprehensive Income (Loss)	61,328					61,328
Share-Based Compensation	11,051				11,051
Preferred Stock Issued, Net	160,614		$ 165,000		(4,386)
Preferred Stock Issued, Net (in shares)			165,000
Common Stock Issued under Purchase and Equity Compensation Plans	4,132			$ 2	533		768	2,829
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				78,753
Common Stock Repurchased	(5,141)							(5,141)
Common Stock Repurchased (in shares)				(83,587)
Cash Dividends Declared Common Stock (per share)	(84,209)						(84,209)
Cash Dividends Declared Preferred Stock	(7,375)						(7,375)
Balance at End of Period at Sep. 30, 2024	1,665,474	$ 180,000	$ 165,000	$ 585	643,620	(335,360)	2,127,585	(1,115,956)
Ending Balance (in shares) at Sep. 30, 2024		180,000	165,000	39,748,304
Balance at Beginning of Period at Jun. 30, 2024	1,612,849	$ 180,000	$ 165,000	$ 585	639,841	(374,361)	2,119,140	(1,117,356)
Beginning Balance (in shares) at Jun. 30, 2024		180,000	165,000	39,729,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	40,358						40,358
Other Comprehensive Income (Loss)	39,001					39,001
Share-Based Compensation	3,546				3,546
Common Stock Issued under Purchase and Equity Compensation Plans	1,395				233		(384)	1,546
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				20,781
Common Stock Repurchased	(146)							(146)
Common Stock Repurchased (in shares)				(2,418)
Cash Dividends Declared Common Stock (per share)	(28,092)						(28,092)
Cash Dividends Declared Preferred Stock	(3,437)						(3,437)
Balance at End of Period at Sep. 30, 2024	$ 1,665,474	$ 180,000	$ 165,000	$ 585	$ 643,620	$ (335,360)	$ 2,127,585	$ (1,115,956)
Ending Balance (in shares) at Sep. 30, 2024		180,000	165,000	39,748,304