Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock, Common
Beginning Balance at Dec. 31, 2021	$ 2,712,680	$ 192,878	$ 559,766	$ 1,519,873	$ 1,282,383	$ 27,411	$ (869,631)
Beginning Balance (in shares) at Dec. 31, 2021		200	160,490
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	134,277				134,277
Other comprehensive income (loss)	(331,621)					(331,621)
Common stock issued	2,698		$ 1,415	1,508			(225)
Common stock issued (in shares)			567
Stock-based compensation awards	6,375			6,375
Preferred stock dividend	(5,124)				(5,124)
Common stock cash dividends	(48,192)				(48,192)
Ending Balance at Jun. 30, 2022	2,471,093	$ 192,878	$ 561,181	1,527,756	1,363,344	(304,210)	(869,856)
Ending Balance (in shares) at Jun. 30, 2022		200	161,057
Beginning Balance at Mar. 31, 2022	2,569,535	$ 192,878	$ 560,045	1,524,110	1,320,076	(158,855)	(868,719)
Beginning Balance (in shares) at Mar. 31, 2022		200	160,669
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	69,989				69,989
Other comprehensive income (loss)	(145,355)					(145,355)
Common stock issued	(95)		$ 1,136	(94)			(1,137)
Common stock issued (in shares)			388
Stock-based compensation awards	3,740			3,740
Preferred stock dividend	(2,562)				(2,562)
Common stock cash dividends	(24,159)				(24,159)
Ending Balance at Jun. 30, 2022	2,471,093	$ 192,878	$ 561,181	1,527,756	1,363,344	(304,210)	(869,856)
Ending Balance (in shares) at Jun. 30, 2022		200	161,057
Beginning Balance at Dec. 31, 2022	2,579,757	$ 192,878	$ 561,511	1,541,840	1,450,758	(385,476)	(781,754)
Beginning Balance (in shares) at Dec. 31, 2022		200	167,599
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	147,920				147,920
Other comprehensive income (loss)	6,190					6,190
Common stock issued	1,009		$ 2,626	(374)			(1,243)
Common stock issued (in shares)			910
Stock-based compensation awards	4,240			4,240
Acquisition of treasury stock (in shares)			(2,412)
Acquisition of treasury stock	(40,449)						(40,449)
Preferred stock dividend	(5,124)				(5,124)
Common stock cash dividends	(51,391)				(51,391)
Ending Balance at Jun. 30, 2023	2,642,152	$ 192,878	$ 564,137	1,545,706	1,542,163	(379,286)	(823,446)
Ending Balance (in shares) at Jun. 30, 2023		200	166,097
Beginning Balance at Mar. 31, 2023	2,618,998	$ 192,878	$ 561,853	1,544,758	1,491,701	(350,992)	(821,200)
Beginning Balance (in shares) at Mar. 31, 2023		200	165,396
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	79,607				79,607
Other comprehensive income (loss)	(28,294)					(28,294)
Common stock issued	(1,585)		$ 2,284	(1,623)			(2,246)
Common stock issued (in shares)			701
Stock-based compensation awards	2,571			2,571
Preferred stock dividend	(2,562)				(2,562)
Common stock cash dividends	(26,583)				(26,583)
Ending Balance at Jun. 30, 2023	$ 2,642,152	$ 192,878	$ 564,137	$ 1,545,706	$ 1,542,163	$ (379,286)	$ (823,446)
Ending Balance (in shares) at Jun. 30, 2023		200	166,097