Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Total
Beginning balance at Dec. 31, 2021	$ 338	$ 697,845	$ 1,066,325	$ 1,764,508
Beginning balance, shares at Dec. 31, 2021	33,761
Vesting of stock-based compensation awards	$ 5	(5)
Vesting of stock-based compensation awards, shares	516
Withholding of common stock upon vesting of stock-based compensation awards	$ (2)	(12,733)		(12,735)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(200)
Repurchases of common stock	$ (18)	(98,287)		(98,305)
Repurchases of common stock, shares	(1,804)
Stock-based compensation expense		9,791		9,791
Cash dividends declared and dividend equivalents		150	(13,375)	(13,225)
Other		(34)		(34)
Net income			301,164	301,164
Ending balance at Jun. 30, 2022	$ 323	596,727	1,354,114	1,951,164
Ending balance, shares at Jun. 30, 2022	32,273
Beginning balance at Mar. 31, 2022	$ 330	627,447	1,202,085	1,829,862
Beginning balance, shares at Mar. 31, 2022	33,038
Vesting of stock-based compensation awards, shares	36
Withholding of common stock upon vesting of stock-based compensation awards		(598)		(598)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(10)
Repurchases of common stock	$ (7)	(35,920)		(35,927)
Repurchases of common stock, shares	(791)
Stock-based compensation expense		5,727		5,727
Cash dividends declared and dividend equivalents		71	(6,639)	(6,568)
Net income			158,668	158,668
Ending balance at Jun. 30, 2022	$ 323	596,727	1,354,114	1,951,164
Ending balance, shares at Jun. 30, 2022	32,273
Beginning balance at Dec. 31, 2022	$ 318	584,803	1,565,094	2,150,215
Beginning balance, shares at Dec. 31, 2022	31,773
Vesting of stock-based compensation awards	$ 4	(4)
Vesting of stock-based compensation awards, shares	447
Withholding of common stock upon vesting of stock-based compensation awards	$ (2)	(10,641)		(10,643)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(170)
Repurchases of common stock		(1,969)		(1,969)
Repurchases of common stock, shares	(30)
Stock-based compensation expense		14,291		14,291
Cash dividends declared and dividend equivalents		376	(15,109)	(14,733)
Net income			84,756	84,756
Ending balance at Jun. 30, 2023	$ 320	586,856	1,634,741	2,221,917
Ending balance, shares at Jun. 30, 2023	32,020
Beginning balance at Mar. 31, 2023	$ 320	580,489	1,590,832	2,171,641
Beginning balance, shares at Mar. 31, 2023	32,026
Vesting of stock-based compensation awards, shares	35
Withholding of common stock upon vesting of stock-based compensation awards		(763)		(763)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(11)
Repurchases of common stock		(1,969)		(1,969)
Repurchases of common stock, shares	(30)
Stock-based compensation expense		8,931		8,931
Cash dividends declared and dividend equivalents		168	(7,536)	(7,368)
Net income			51,445	51,445
Ending balance at Jun. 30, 2023	$ 320	$ 586,856	$ 1,634,741	$ 2,221,917
Ending balance, shares at Jun. 30, 2023	32,020