Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Treasury Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance at Dec. 31, 2020	$ 2,261,539		$ 329		$ (217,889)		$ 873,874		$ (1,904)		$ 1,607,129
Net Income	197,043		0		0		0		0		197,043
Other comprehensive income	400		0		0		0		400		0
Stock-based compensation	7,466		0		0		7,466		0		0
Issuance of warrants	6,456		0		0		6,456		0		0
Treasury shares withheld for payment of taxes	(7,432)		0		(7,432)		0		0		0
Issuance of shares related to settlement of warrant	31,582		13		0		31,569		0		0
Issuance of shares of restricted stock	0		3		0		(3)		0		0
Ending Balance at Jun. 30, 2021	2,497,054		345		(225,321)		919,362		(1,504)		1,804,172
Beginning Balance at Mar. 31, 2021	2,383,196		345		(225,239)		912,728		(1,700)		1,697,062
Net Income	107,110		0		0		0		0		107,110
Other comprehensive income	196		0		0		0		196		0
Stock-based compensation	3,406		0		0		3,406		0		0
Issuance of warrants	3,228						3,228
Treasury shares withheld for payment of taxes	(82)		0		(82)		0		0		0
Issuance of shares of restricted stock	0		0		0		0		0		0
Ending Balance at Jun. 30, 2021	2,497,054		345		(225,321)		919,362		(1,504)		1,804,172
Beginning Balance at Dec. 31, 2021	2,809,337	$ (24,041)	347	$ 0	(225,461)	$ 0	934,516	$ (92,586)	(511)	$ 0	2,100,446	$ 68,545
Net Income	169,769		0		0		0		0		169,769
Other comprehensive income	586		0		0		0		586		0
Stock-based compensation	5,656		0		0		5,656		0		0
Issuance of shares related to settlement of convertible notes			1
Issuance of warrants	7,532		0		0		7,532		0		0
Purchase of shares of treasury stock	(100,109)		0		(100,109)		0		0		0
Treasury shares withheld for payment of taxes	(12,065)		0		(12,065)		0		0		0
Issuance of shares of restricted stock	0		4		0		(4)		0		0
Ending Balance at Jun. 30, 2022	2,864,566		352		(337,635)		863,014		75		2,338,760
Beginning Balance at Mar. 31, 2022	2,761,331		351		(317,480)		828,391		(433)		2,250,502
Net Income	88,258		0		0		0		0		88,258
Other comprehensive income	508		0		0		0		508		0
Stock-based compensation	3,461		0		0		3,461		0		0
Issuance of shares related to settlement of convertible notes	7,901		1		0		7,900		0		0
Receipt of shares related to settlement of convertible note hedge transaction	0		0		0		0		0		0
Issuance of warrants	3,228		0		0		3,228		0		0
Purchase of shares of treasury stock			0		(20,144)		20,034		0		0
Purchase of treasury stock	(110)
Treasury shares withheld for payment of taxes	(11)		0		(11)		0		0		0
Issuance of shares of restricted stock	0		0		0		0		0		0
Ending Balance at Jun. 30, 2022	$ 2,864,566		$ 352		$ (337,635)		$ 863,014		$ 75		$ 2,338,760