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)			1,058,640		1,058,640
Other comprehensive income (loss)				3,188	3,188
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		10,574			10,574
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	19,000
Net issuance of common stock upon exercise of stock options	$ 1	26,021			26,022
Net issuance of common stock upon exercise of stock options, shares	91,000
Share-based compensation		11,811			11,811
Share repurchases, including fees	$ (33)	(67,263)	(2,083,946)		$ (2,151,242)
Share repurchases, including fees, shares	(3,386,000)				(3,386,000)
Balance at end 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
Balance at beginning of period at Mar. 31, 2022	$ 659	1,309,071	(1,636,267)	(1,736)	(328,273)
Balance (in shares) at Mar. 31, 2022	65,920,000
Net Income (Loss)			576,760		576,760
Other comprehensive income (loss)				(1,875)	(1,875)
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		5,692			5,692
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	11,000
Net issuance of common stock upon exercise of stock options		10,583			10,583
Net issuance of common stock upon exercise of stock options, shares	41,000
Share-based compensation		5,717			5,717
Share repurchases, including fees	$ (21)	(44,412)	(1,331,601)		$ (1,376,034)
Share repurchases, including fees, shares	(2,219,000)				(2,219,000)
Balance at end 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
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)			1,144,250		$ 1,144,250
Other comprehensive income (loss)				33,075	33,075
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		11,410			11,410
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares	15,000
Net issuance of common stock upon exercise of stock options	$ 1	38,798			38,799
Net issuance of common stock upon exercise of stock options, shares	143,000
Share-based compensation		13,655			13,655
Share repurchases, including fees	$ (21)	(45,081)	(1,746,349)		$ (1,791,451)
Share repurchases, including fees, shares	(2,109,000)				(2,109,000)
Excise tax on share repurchases			(16,459)		$ (16,459)
Balance at end 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				60,402,359
Balance at beginning of period at Mar. 31, 2023	$ 610	1,305,276	(2,952,797)	21,894	$ (1,625,017)
Balance (in shares) at Mar. 31, 2023	61,039,000
Net Income (Loss)			627,365		627,365
Other comprehensive income (loss)				14,177	14,177
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes		6,117			6,117
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	28,543			28,544
Net issuance of common stock upon exercise of stock options, shares	108,000
Share-based compensation		6,675			6,675
Share repurchases, including fees	$ (7)	(16,341)	(663,642)		$ (679,990)
Share repurchases, including fees, shares	(752,000)				(752,000)
Excise tax on share repurchases			(5,344)		$ (5,344)
Balance at end 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				60,402,359

[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.