Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning Balance at Dec. 31, 2018	$ 3,340,180	$ 123	$ 2,306,843	$ 3,817,656	$ (913,858)	$ (1,870,584)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	895,073			895,073
Other comprehensive loss, net of tax	(58,607)				(58,607)
Acquisition of common stock	(694,909)		(42,000)			(652,909)
Share-based compensation expense	60,953		60,953
Issuance of common stock	168,926	1	168,925
Ending Balance at Dec. 31, 2019	3,711,616	124	2,494,721	4,712,729	(972,465)	(2,523,493)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	704,216			704,216
Other comprehensive loss, net of tax	(390,693)				(390,693)
Acquisition of common stock	(849,909)		75,000			(924,909)
Share-based compensation expense	43,384		43,384
Issuance of common stock	136,797	2	136,795
Ending Balance at Dec. 31, 2020	3,355,411	126	2,749,900	5,416,945	(1,363,158)	(3,448,402)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	839,497			839,497
Other comprehensive loss, net of tax	(101,458)				(101,458)
Acquisition of common stock	(1,355,722)					(1,355,722)
Share-based compensation expense	80,071		80,071
Issuance of common stock	48,781	1	48,780
Ending Balance at Dec. 31, 2021	$ 2,866,580	$ 127	$ 2,878,751	$ 6,256,442	$ (1,464,616)	$ (4,804,124)