Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Capital Surplus	Accum. Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Balance at Beginning of Period at Dec. 31, 2020	$ 1,374,507		$ 580	$ 591,360	$ 7,822	$ 1,811,979	$ (1,037,234)
Beginning Balance (in shares) at Dec. 31, 2020			40,119,312
Increase (decrease) in shareholders' equity
Net Income (Loss)	253,372					253,372
Other Comprehensive Income (Loss)	(74,204)				(74,204)
Share-Based Compensation	13,267			13,267
Preferred Stock Issued, Net	175,487	$ 180,000		(4,513)
Preferred Stock Issued, Net (in shares)		180,000
Common Stock Issued under Purchase and Equity Compensation Plans	14,048		$ 1	2,394		(1,368)	13,021
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)			507,121
Common Stock Repurchased	(31,258)						(31,258)
Common Stock Repurchased (in shares)			(373,240)
Cash Dividends Declared Common Stock (per share)	(110,633)					(110,633)
Cash Dividends Declared Preferred Stock	(2,975)					(2,975)
Balance at End of Period at Dec. 31, 2021	1,611,611	$ 180,000	$ 581	602,508	(66,382)	1,950,375	(1,055,471)
Ending Balance (in shares) at Dec. 31, 2021		180,000	40,253,193
Increase (decrease) in shareholders' equity
Net Income (Loss)	225,804					225,804
Other Comprehensive Income (Loss)	(368,276)				(368,276)
Share-Based Compensation	16,066			16,066
Common Stock Issued under Purchase and Equity Compensation Plans	7,287		$ 1	2,004		167	5,115
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)			272,007
Common Stock Repurchased	(55,063)						55,063
Common Stock Repurchased (in shares)			(689,450)
Cash Dividends Declared Common Stock (per share)	(112,557)					(112,557)
Cash Dividends Declared Preferred Stock	(7,877)					(7,877)
Balance at End of Period at Dec. 31, 2022	1,316,995	$ 180,000	$ 582	620,578	(434,658)	2,055,912	(1,105,419)
Ending Balance (in shares) at Dec. 31, 2022		180,000	39,835,750
Increase (decrease) in shareholders' equity
Net Income (Loss)	171,202					171,202
Other Comprehensive Income (Loss)	37,970				37,970
Share-Based Compensation	15,656			15,656
Common Stock Issued under Purchase and Equity Compensation Plans	6,381		$ 1	188		127	6,065
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)			130,286
Common Stock Repurchased	$ (14,290)						14,290
Common Stock Repurchased (in shares)	(150,000)		(212,898)
Cash Dividends Declared Common Stock (per share)	$ (111,795)					(111,795)
Cash Dividends Declared Preferred Stock	(7,877)					(7,877)
Balance at End of Period at Dec. 31, 2023	$ 1,414,242	$ 180,000	$ 583	$ 636,422	$ (396,688)	$ 2,107,569	$ (1,113,644)
Ending Balance (in shares) at Dec. 31, 2023		180,000	39,753,138