CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Adjustment	Common Stock	Additional paid in capital	Additional paid in capital Adjustment	Accumulated other comprehensive loss	Retained earnings	Retained earnings Adjustment
Balance at beginning of period (in shares) at Dec. 31, 2020			16,080
Balance at beginning of period at Dec. 31, 2020	$ 709,525		$ 16	$ 318,358		$ (801)	$ 391,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes (in shares)			572
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes	20,581		$ 1	20,580
Share-based compensation	8,405			8,405
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(55)					(55)
Reacquisition of equity due to 2023 debt extinguishment, net of tax	(11,118)			(11,118)
Warrant and bond hedge unwind transactions	396			396
Net income (loss)	18,106						18,106
Balance at end of period (in shares) at Mar. 31, 2021			16,652
Balance at end of period at Mar. 31, 2021	745,840		$ 17	336,621		(856)	410,058
Balance at beginning of period (in shares) at Dec. 31, 2020			16,080
Balance at beginning of period at Dec. 31, 2020	709,525		$ 16	318,358		(801)	391,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(74)
Net income (loss)	62,554
Balance at end of period (in shares) at Sep. 30, 2021			16,707
Balance at end of period at Sep. 30, 2021	812,066		$ 17	358,418		(875)	454,506
Balance at beginning of period (in shares) at Dec. 31, 2020			16,080
Balance at beginning of period at Dec. 31, 2020	$ 709,525		$ 16	318,358		(801)	391,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2020-06
Balance at end of period (in shares) at Dec. 31, 2021	16,767		16,767
Balance at end of period at Dec. 31, 2021	$ 821,159	$ (15,997)	$ 17	372,969	$ (51,130)	(917)	449,090	$ 35,133
Balance at beginning of period (in shares) at Mar. 31, 2021			16,652
Balance at beginning of period at Mar. 31, 2021	745,840		$ 17	336,621		(856)	410,058
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes (in shares)			24
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes	1,103			1,103
Share-based compensation	10,216			10,216
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(5)					(5)
Reacquisition of equity due to 2023 debt extinguishment, net of tax	(1,362)			(1,362)
Net income (loss)	30,725						30,725
Balance at end of period (in shares) at Jun. 30, 2021			16,676
Balance at end of period at Jun. 30, 2021	786,517		$ 17	346,578		(861)	440,783
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes (in shares)			31
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes	1,898			1,898
Share-based compensation	9,754			9,754
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(14)					(14)
Reacquisition of equity due to 2023 debt extinguishment, net of tax	92			92
Warrant and bond hedge unwind transactions	96			96
Net income (loss)	13,723						13,723
Balance at end of period (in shares) at Sep. 30, 2021			16,707
Balance at end of period at Sep. 30, 2021	$ 812,066		$ 17	358,418		(875)	454,506
Balance at beginning of period (in shares) at Dec. 31, 2021	16,767		16,767
Balance at beginning of period at Dec. 31, 2021	$ 821,159	(15,997)	$ 17	372,969	(51,130)	(917)	449,090	35,133
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes (in shares)			94
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes	(5,515)			(5,515)
Share-based compensation	9,044			9,044
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(114)					(114)
Net income (loss)	(15,385)						(15,385)
Balance at end of period (in shares) at Mar. 31, 2022			16,861
Balance at end of period at Mar. 31, 2022	$ 793,192		$ 17	325,368		(1,031)	468,838
Balance at beginning of period (in shares) at Dec. 31, 2021	16,767		16,767
Balance at beginning of period at Dec. 31, 2021	$ 821,159	$ (15,997)	$ 17	372,969	$ (51,130)	(917)	449,090	$ 35,133
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(143)
Net income (loss)	$ (15,876)
Balance at end of period (in shares) at Sep. 30, 2022	16,894		16,894
Balance at end of period at Sep. 30, 2022	$ 816,298		$ 17	348,994		(1,060)	468,347
Balance at beginning of period (in shares) at Mar. 31, 2022			16,861
Balance at beginning of period at Mar. 31, 2022	793,192		$ 17	325,368		(1,031)	468,838
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes (in shares)			21
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes	604			604
Share-based compensation	9,499			9,499
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	(35)					(35)
Net income (loss)	(895)						(895)
Balance at end of period (in shares) at Jun. 30, 2022			16,882
Balance at end of period at Jun. 30, 2022	802,365		$ 17	335,471		(1,066)	467,943
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes (in shares)			12
Issuance of common stock under employee stock compensation plans, net of shares withheld for payroll taxes	724			724
Share-based compensation	12,597			12,597
Unrealized net gain (loss) on available-for-sale securities, net of deferred tax	6					6
Warrant and bond hedge unwind transactions	202			202
Net income (loss)	$ 404						404
Balance at end of period (in shares) at Sep. 30, 2022	16,894		16,894
Balance at end of period at Sep. 30, 2022	$ 816,298		$ 17	$ 348,994		$ (1,060)	$ 468,347