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, 2020	$ 334	$ 697,200	$ 583,171	$ 1,280,705
Beginning balance, shares at Dec. 31, 2020	33,351
Vesting of stock-based compensation awards and issuance of unrestricted common stock awards	$ 7	(7)
Vesting of stock-based compensation awards and issuance of unrestricted common stock awards, shares	675
Withholding of common stock upon vesting of stock-based compensation awards	$ (3)	(13,723)		(13,726)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(265)
Repurchases of common stock, shares
Stock-based compensation expense		14,377		14,377
Cash dividends declared and dividend equivalents		158	(15,350)	(15,192)
Other		(160)		(160)
Net income			498,504	498,504
Ending balance at Dec. 31, 2021	$ 338	697,845	1,066,325	1,764,508
Ending balance, shares at Dec. 31, 2021	33,761
Vesting of stock-based compensation awards and issuance of unrestricted common stock awards	$ 5	(5)
Vesting of stock-based compensation awards and issuance of unrestricted common stock awards, shares	518
Withholding of common stock upon vesting of stock-based compensation awards	$ (2)	(12,752)		(12,754)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(201)
Repurchases of common stock	$ (23)	(120,623)		(120,646)
Repurchases of common stock, shares	(2,305)
Stock-based compensation expense		20,049		20,049
Cash dividends declared and dividend equivalents		323	(26,357)	(26,034)
Other		(34)		(34)
Net income			525,126	525,126
Ending balance at Dec. 31, 2022	$ 318	584,803	1,565,094	2,150,215
Ending balance, shares at Dec. 31, 2022	31,773
Vesting of stock-based compensation awards and issuance of unrestricted common stock awards	$ 4	(4)
Vesting of stock-based compensation awards and issuance of unrestricted common stock awards, shares	450
Withholding of common stock upon vesting of stock-based compensation awards	$ (2)	(10,670)		(10,672)
Withholding of common stock upon vesting of stock-based compensation awards, shares	(170)
Repurchases of common stock	$ (2)	(19,225)		(19,227)
Repurchases of common stock, shares	(278)
Stock-based compensation expense		36,777		36,777
Cash dividends declared and dividend equivalents		1,308	(30,689)	(29,381)
Net income			259,224	259,224
Ending balance at Dec. 31, 2023	$ 318	$ 592,989	$ 1,793,629	$ 2,386,936
Ending balance, shares at Dec. 31, 2023	31,775