CONDENSED 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, 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)			1,644,078		1,644,078
Other comprehensive income (loss)				2,816	2,816
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		15,272			15,272
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	26,000
Net issuance of common stock upon exercise of stock options	$ 2	42,786			42,788
Net issuance of common stock upon exercise of stock options, shares	169,000
Share-based compensation		17,563			17,563
Share repurchases, including fees	$ (44)	(88,404)	(2,773,109)		$ (2,861,557)
Share repurchases, including fees, shares	(4,425,000)				(4,425,000)
Balance at end of period at Sep. 30, 2022	$ 628	1,292,725	(2,494,833)	(3,983)	$ (1,205,463)
Balance (in shares) at Sep. 30, 2022	62,799,000
Balance at beginning of period at Jun. 30, 2022	$ 638	1,286,651	(2,391,108)	(3,611)	(1,107,430)
Balance (in shares) at Jun. 30, 2022	63,753,000
Net Income (Loss)			585,438		585,438
Other comprehensive income (loss)				(372)	(372)
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		4,698			4,698
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	7,000
Net issuance of common stock upon exercise of stock options	$ 1	16,765			16,766
Net issuance of common stock upon exercise of stock options, shares	78,000
Share-based compensation		5,752			5,752
Share repurchases, including fees	$ (11)	(21,141)	(689,163)		$ (710,315)
Share repurchases, including fees, shares	(1,039,000)				(1,039,000)
Balance at end of period at Sep. 30, 2022	$ 628	1,292,725	(2,494,833)	(3,983)	$ (1,205,463)
Balance (in shares) at Sep. 30, 2022	62,799,000
Balance at beginning of period at Dec. 31, 2022	$ 624	1,311,488	(2,375,860)	2,996	$ (1,060,752)	[1]
Balance (in shares) at Dec. 31, 2022	62,353,000				62,353,221
Net Income (Loss)			1,794,077		$ 1,794,077
Other comprehensive income (loss)				27,293	27,293
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		16,649			16,649
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	22,000
Net issuance of common stock upon exercise of stock options	$ 2	56,483			56,485
Net issuance of common stock upon exercise of stock options, shares	207,000
Share-based compensation		20,555			20,555
Share repurchases, including fees	$ (30)	(64,012)	(2,526,938)		$ (2,590,980)
Share repurchases, including fees, shares	(2,961,000)				(2,961,000)
Excise tax on share repurchases			(23,796)		$ (23,796)
Balance at end of period at Sep. 30, 2023	$ 596	1,341,163	(3,132,517)	30,289	$ (1,760,469)
Balance (in shares) at Sep. 30, 2023	59,621,000				59,621,138
Balance at beginning of period at Jun. 30, 2023	$ 604	1,330,270	(2,994,418)	36,071	$ (1,627,473)
Balance (in shares) at Jun. 30, 2023	60,402,000
Net Income (Loss)			649,827		649,827
Other comprehensive income (loss)				(5,782)	(5,782)
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		5,239			5,239
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	7,000
Net issuance of common stock upon exercise of stock options	$ 1	17,685			17,686
Net issuance of common stock upon exercise of stock options, shares	64,000
Share-based compensation		6,900			6,900
Share repurchases, including fees	$ (9)	(18,931)	(780,589)		$ (799,529)
Share repurchases, including fees, shares	(852,000)				(852,000)
Excise tax on share repurchases			(7,337)		$ (7,337)
Balance at end of period at Sep. 30, 2023	$ 596	$ 1,341,163	$ (3,132,517)	$ 30,289	$ (1,760,469)
Balance (in shares) at Sep. 30, 2023	59,621,000				59,621,138

[1] The balance sheet at December 31, 2022, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by United States generally accepted accounting principles for complete financial statements.