Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated other comprehensive (loss) income	Retained earnings	Convertible Debt	Convertible Debt Common Stock
Beginning Balance at Dec. 31, 2018	$ 425,584	$ 39	$ 363,921	$ (139)	$ 61,763
Beginning Balance, shares at Dec. 31, 2018		39,386,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans	16,799	$ 2	16,797
Issuance of common stock under equity compensation plans, shares		1,152,000
Stock-based compensation expense	12,088		12,088
Issuance of shares in exchange for Convertible Notes	86,428	$ 1	86,427
Issuance of shares in exchange for Convertible Notes, shares							1,497,000
Tax impact from the conversion of Convertible Notes	568		568
Reduction for equity component of Convertible Notes exchanged	(43,516)		(43,516)
Tax withholdings related to vesting of stock-based awards	(10,728)		(10,728)
Tax withholdings related to vesting of stock-based awards, shares		(167,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(324)			(324)
Net income	72,921				72,921
Ending Balance at Dec. 31, 2019	559,820	$ 42	425,557	(463)	134,684
Ending Balance, shares at Dec. 31, 2019		41,868,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans	10,380	$ 0	10,380
Issuance of common stock under equity compensation plans, shares		490,000
Stock-based compensation expense	18,969		18,969
Issuance of shares in exchange for Convertible Notes	7,230	$ 0	7,230
Issuance of shares in exchange for Convertible Notes, shares						225,955	226,000
Tax impact from the conversion of Convertible Notes	54		54
Derivative liabilities - Convertible Notes elected to settle in cash	(26,180)		(26,180)
Tax withholdings related to vesting of stock-based awards	(4,198)		(4,198)
Tax withholdings related to vesting of stock-based awards, shares		(37,000)
Repurchases of common stock	$ (43,691)	$ 0	(43,691)
Repurchase of common stock, shares	(257,329)	(257,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 32			32
Net income	810,287				810,287
Ending Balance at Dec. 31, 2020	1,332,703	$ 42	388,121	(431)	944,971
Ending Balance, shares at Dec. 31, 2020		42,290,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans	9,552	$ 1	9,551
Issuance of common stock under equity compensation plans, shares		534,000
Stock-based compensation expense	22,679		22,679
Tax withholdings related to vesting of stock-based awards	(37,146)		(37,146)
Tax withholdings related to vesting of stock-based awards, shares		(181,000)
Repurchases of common stock	$ (103,438)	$ (1)	(103,437)
Repurchase of common stock, shares	(957,239)	(957,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 786			786
Net income	704,226				704,226
Ending Balance at Dec. 31, 2021	$ 1,929,362	$ 42	$ 279,768	$ 355	$ 1,649,197
Ending Balance, shares at Dec. 31, 2021		41,686,000