CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Various Stock Compensation Plans And Agreements	Stock Repurchase Plan	Common Stock	Common Stock Various Stock Compensation Plans And Agreements	Common Stock Stock Repurchase Plan	Common Stock and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Treasury Stock Various Stock Compensation Plans And Agreements	Treasury Stock Stock Repurchase Plan	AOCI, Net of Tax
Increase (Decrease) in Stockholders' Equity
Beginning balance (in shares)				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	429,736							429,736
Other comprehensive income (loss)	(59,014)											(59,014)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)				513,806
Issuance of common stock pursuant to various stock compensation plans and agreements	17,728						17,728
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan (in shares)					(201,530)
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan		$ (15,254)								$ (15,254)
Cash dividends on common stock	(94,823)							(94,823)
Ending balance at Jun. 30, 2021	5,547,548						1,876,247	4,335,327	(649,337)			(14,689)
Increase (Decrease) in Stockholders' Equity
Beginning balance (in shares)				141,843,036
Beginning balance at Mar. 31, 2021	5,285,027						1,866,101	4,158,032	(649,066)			(90,040)
Increase (Decrease) in Stockholders' Equity
Net income	224,742							224,742
Other comprehensive income (loss)	75,351											75,351
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)				38,073
Issuance of common stock pursuant to various stock compensation plans and agreements	10,146						10,146
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan (in shares)					(3,604)
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan		(271)								(271)
Cash dividends on common stock	(47,447)							(47,447)
Ending balance at Jun. 30, 2021	5,547,548						1,876,247	4,335,327	(649,337)			(14,689)
Increase (Decrease) in Stockholders' Equity
Beginning balance (in shares)				141,877,505
Beginning balance (in shares)				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	495,981							495,981
Other comprehensive income (loss)	(510,267)											(510,267)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)				639,847
Issuance of common stock pursuant to various stock compensation plans and agreements	20,507						20,507
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan (in shares)					(244,895)	(1,385,517)
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan		(18,977)	$ (99,990)							(18,977)	$ (99,990)
Cash dividends on common stock	(114,990)							(114,990)
Ending balance at Jun. 30, 2022	5,609,482						1,914,232	5,064,650	(768,752)			(600,648)
Increase (Decrease) in Stockholders' Equity
Beginning balance (in shares)				142,256,520
Beginning balance at Mar. 31, 2022	5,703,456						1,903,042	4,863,721	(668,382)			(394,925)
Increase (Decrease) in Stockholders' Equity
Net income	258,329							258,329
Other comprehensive income (loss)	(205,723)											(205,723)
Issuance of common stock pursuant to various stock compensation plans and agreements (in shares)				51,733
Issuance of common stock pursuant to various stock compensation plans and agreements	11,190						11,190
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan (in shares)					(5,347)	(1,385,517)
Repurchase of common stock pursuant to various stock compensation plans and agreements and Stock Repurchase Plan		$ (380)	$ (99,990)							$ (380)	$ (99,990)
Cash dividends on common stock	(57,400)							(57,400)
Ending balance at Jun. 30, 2022	$ 5,609,482						$ 1,914,232	$ 5,064,650	$ (768,752)			$ (600,648)
Increase (Decrease) in Stockholders' Equity
Beginning balance (in shares)				140,917,389