Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning of period, (in shares) at Dec. 31, 2018			119,078
Balance at beginning of period at Dec. 31, 2018	$ 1,063,198		$ 119	$ 1,079,188	$ (16,109)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	454,433					454,433
Other comprehensive income (loss)	(3,877)				(3,877)
Dividends declared	(145,726)					(145,726)
Net issuances of restricted stock (in shares)			647
Net issuances of restricted stock	0		$ 1	(1)
Stock-based compensation expense	48,300			48,300
Repurchases of common stock, (in shares)			(4,605)
Repurchases of common stock	(272,645)		$ (5)			(272,640)
Balance at end of period, (in shares) at Dec. 31, 2019			115,120
Balance at end of period at Dec. 31, 2019	1,143,683	$ (558)	$ 115	1,127,487	(19,986)	36,067	$ (558)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	306,276					306,276
Other comprehensive income (loss)	15,254				15,254
Dividends declared	(156,045)					(156,045)
Net issuances of restricted stock (in shares)			879
Net issuances of restricted stock	0		$ 1	(1)
Stock-based compensation expense	52,486			52,486
Repurchases of common stock, (in shares)			(2,871)
Repurchases of common stock	(155,807)		$ (3)			(155,804)
Balance at end of period, (in shares) at Dec. 31, 2020			113,128
Balance at end of period at Dec. 31, 2020	1,205,289		$ 113	1,179,972	(4,732)	29,936
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	598,626					598,626
Other comprehensive income (loss)	(17,890)				(17,890)
Dividends declared	(170,679)					(170,679)
Net issuances of restricted stock (in shares)			701
Net issuances of restricted stock	0		$ 1	(1)
Stock-based compensation expense	55,932			55,932
Repurchases of common stock, (in shares)			(3,143)
Repurchases of common stock	(290,227)		$ (3)			(290,224)
Balance at end of period, (in shares) at Dec. 31, 2021			110,686
Balance at end of period at Dec. 31, 2021	$ 1,381,051		$ 111	$ 1,235,903	$ (22,622)	$ 167,659