Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Capital Surplus	Accum. Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock
Balance at Beginning of Period at Dec. 31, 2019	$ 1,286,832	$ 3,632		$ 579	$ 582,566	$ (31,112)	$ 1,761,415	$ 3,632	$ (1,026,616)
Beginning Balance (in shares) at Dec. 31, 2019				40,039,695
Increase (decrease) in shareholders' equity
Net Income	153,804						153,804
Other Comprehensive Income (Loss)	$ 38,934					38,934
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13
Share-Based Compensation	$ 7,577				7,577
Common Stock Issued under Purchase and Equity Compensation Plans	9,168			$ 1	1,217		562		7,388
Common Stock Issued under Purchase and Equity Compensation Plans (in shares)				283,482
Common Stock Repurchased	(18,006)								(18,006)
Common Stock Repurchased (in shares)				(203,865)
Cash Dividends Declared Common Stock (per share)	(107,434)						(107,434)
Balance at End of Period at Dec. 31, 2020	1,374,507			$ 580	591,360	7,822	1,811,979		(1,037,234)
Ending Balance (in shares) at Dec. 31, 2020				40,119,312
Increase (decrease) in shareholders' equity
Net Income	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	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)	(627,629)			(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