CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings (deficit) [Member]	Accumulated other comprehensive income (loss) [Member]	Total
Balance at beginning of period at Dec. 31, 2020	$ 711	$ 1,280,841	$ (1,139,139)	$ (2,155)	$ 140,258
Balance (in shares) at Dec. 31, 2020	71,123,000
Net Income (Loss)			2,164,685		2,164,685
Other comprehensive income (loss)				(4,644)	(4,644)
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		18,511			18,511
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	39,000
Net issuance of common stock upon exercise of stock options	$ 4	67,757			67,761
Net issuance of common stock upon exercise of stock options, shares	404,000
Share-based compensation		23,054			23,054
Share repurchases, including fees	$ (45)	(84,655)	(2,391,348)		(2,476,048)
Share repurchases, including fees, shares	(4,537,000)
Balance at end of period at Dec. 31, 2021	$ 670	1,305,508	(1,365,802)	(6,799)	(66,423)
Balance (in shares) at Dec. 31, 2021	67,029,000
Net Income (Loss)			2,172,650		2,172,650
Other comprehensive income (loss)				9,795	9,795
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		19,864			19,864
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	34,000
Net issuance of common stock upon exercise of stock options	$ 3	60,974			60,977
Net issuance of common stock upon exercise of stock options, shares	251,000
Share-based compensation		24,650			24,650
Share repurchases, including fees	$ (49)	(99,508)	(3,182,708)		$ (3,282,265)
Share repurchases, including fees, shares	(4,961,000)				(4,961,000)
Balance at end of period at Dec. 31, 2022	$ 624	1,311,488	(2,375,860)	2,996	$ (1,060,752)
Balance (in shares) at Dec. 31, 2022	62,353,000				62,353,221
Net Income (Loss)			2,346,581		$ 2,346,581
Other comprehensive income (loss)				36,392	36,392
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		21,691			21,691
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	28,000
Net issuance of common stock upon exercise of stock options	$ 3	71,150			71,153
Net issuance of common stock upon exercise of stock options, shares	260,000
Share-based compensation		25,642			25,642
Share repurchases, including fees	$ (36)	(77,696)	(3,073,423)		$ (3,151,155)
Share repurchases, including fees, shares	(3,568,000)				(3,568,000)
Excise tax on share repurchases			(28,830)		$ (28,830)
Balance at end of period at Dec. 31, 2023	$ 591	$ 1,352,275	$ (3,131,532)	$ 39,388	$ (1,739,278)
Balance (in shares) at Dec. 31, 2023	59,073,000				59,072,792