Consolidated Statement of Changes in Stockholders' Equity - Unaudited - USD ($) $ in Thousands	Total	Common Stock	Common Stock and Additional Paid-In Capital	Retained Earnings	Treasury Stock	AOCI, Net of Tax
Beginning balance (in shares) at Dec. 31, 2020		141,565,229
Beginning balance at Dec. 31, 2020	$ 5,269,175		$ 1,858,519	$ 4,000,414	$ (634,083)	$ 44,325
Increase (Decrease) in Stockholders' Equity
Net income	204,994			204,994
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(134,365)					(134,365)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)		475,733
Issuance of common stock pursuant to various stock compensation plans and agreements	7,582		7,582
Repurchase of common stock pursuant to the Stock Repurchase Program (in shares)		(197,926)
Repurchase of common stock pursuant to various stock compensation plans and agreements	(14,983)				(14,983)
Cash dividends on common stock	(47,376)			(47,376)
Ending balance (in shares) at Mar. 31, 2021		141,843,036
Ending balance at Mar. 31, 2021	5,285,027		1,866,101	4,158,032	(649,066)	(90,040)
Beginning balance (in shares) at Dec. 31, 2021		141,907,954
Beginning balance at Dec. 31, 2021	5,837,218		1,893,725	4,683,659	(649,785)	(90,381)
Increase (Decrease) in Stockholders' Equity
Net income	237,652			237,652
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(304,544)					(304,544)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)		588,114
Issuance of common stock pursuant to various stock compensation plans and agreements	9,317		9,317
Repurchase of common stock pursuant to the Stock Repurchase Program (in shares)		(239,548)
Repurchase of common stock pursuant to various stock compensation plans and agreements	(18,597)				(18,597)
Cash dividends on common stock	(57,590)			(57,590)
Ending balance (in shares) at Mar. 31, 2022		142,256,520
Ending balance at Mar. 31, 2022	$ 5,703,456		$ 1,903,042	$ 4,863,721	$ (668,382)	$ (394,925)