Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock Issuance	Common Stock Issuance	Preferred Stock	Preferred Stock Preferred Stock Issuance	Common Stock	Common Stock Common Stock Issuance	Additional Paid-in Capital	Additional Paid-in Capital Common Stock Issuance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Treasury Stock Common Stock Issuance
Beginning Balance at Dec. 31, 2018	$ 2,247,573				$ 0		$ 554,377		$ 1,489,703		$ 946,032		$ (59,063)	$ (683,476)
Beginning Balance (in shares) at Dec. 31, 2018					0		170,184
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	226,339										226,339
Other comprehensive income (loss)	58,926												58,926
Stock issued	6,362						$ 1,733		2,565					2,064
Stock issued (in shares)							883
Stock-based compensation awards	7,413								7,413
Acquisition of treasury stock	(111,457)													(111,457)
Acquisition of treasury stock (in shares)							(6,849)
Common stock cash dividends	(92,980)										(92,980)
Ending Balance at Dec. 31, 2019	2,342,176	$ (43,807)			$ 0		$ 556,110		1,499,681		1,079,391	$ (43,807)	(137)	(792,869)
Ending Balance (in shares) at Dec. 31, 2019					0		164,218
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	178,040										178,040
Other comprehensive income (loss)	65,228												65,228
Stock issued	7,375		$ 192,878			$ 192,878	$ 1,807		907					4,661
Stock issued (in shares)						200	1,040
Stock-based compensation awards	7,529								7,529
Acquisition of treasury stock	(39,748)													(39,748)
Acquisition of treasury stock (in shares)							(2,908)
Preferred stock dividend	(2,135)										(2,135)
Common stock cash dividends	(90,708)										(90,708)
Ending Balance at Dec. 31, 2020	2,616,828				$ 192,878		$ 557,917		1,508,117		1,120,781		65,091	(827,956)
Ending Balance (in shares) at Dec. 31, 2020					200		162,350
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	275,497										275,497
Other comprehensive income (loss)	(37,680)												(37,680)
Stock issued				$ 7,437				$ 1,849		$ 3,354					$ 2,234
Stock issued (in shares)								943
Stock-based compensation awards	8,402								8,402
Acquisition of treasury stock	(43,909)													(43,909)
Acquisition of treasury stock (in shares)							(2,803)
Preferred stock dividend	(10,277)										(10,277)
Common stock cash dividends	(103,618)										(103,618)
Ending Balance at Dec. 31, 2021	$ 2,712,680				$ 192,878		$ 559,766		$ 1,519,873		$ 1,282,383		$ 27,411	$ (869,631)
Ending Balance (in shares) at Dec. 31, 2021					200		160,490