Equity - Changes in Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance at beginning of period	$ 196,076	$ 202,928	$ 170,035	$ 186,031	$ 202,928	$ 186,031
Exercise of common stock options	1,545	3,261	4,093	4,102
Issuance for employee stock purchase plan		203		358
Vesting of RSUs and PSUs	1
Shares withheld for employee taxes upon vesting of RSUs and PSUs	(511)	(3,382)	(421)
Shares withheld for employee taxes upon vesting of RSUs and PSUs				(3,508)
Stock-based compensation	5,692	6,135	6,516	6,879
Net (loss) income	(5,191)	(13,069)	72,843	15,662	(18,260)	88,505
Balance at end of period	197,612	196,076	253,066	170,035	197,612	253,066
Adjustment.
Balance at beginning of period				(39,489)		(39,489)
Common stock
Balance at beginning of period	$ 36	$ 36	$ 35	$ 35	$ 36	$ 35
Balance at beginning of period, shares	36,380,997	35,806,119	35,203,824	34,612,054	35,806,119	34,612,054
Exercise of common stock options			$ 1
Exercise of common stock options, shares	102,283	190,074	273,127	289,164
Issuance for employee stock purchase plan, shares		13,421		24,630
Vesting of RSUs and PSUs	$ 1
Vesting of RSUs and PSUs, shares	111,056	563,050	65,107	413,538
Shares withheld for employee taxes upon vesting of RSUs and PSUs, shares	(26,506)	(191,667)	(18,141)
Shares withheld for employee taxes upon vesting of RSUs and PSUs				(135,562)
Balance at end of period	$ 37	$ 36	$ 36	$ 35	$ 37	$ 36
Balance at end of period, shares	36,567,830	36,380,997	35,523,917	35,203,824	36,567,830	35,523,917
Additional Paid-In Capital
Balance at beginning of period	$ 513,312	$ 502,095	$ 482,197	$ 519,143	$ 502,095	$ 519,143
Exercise of common stock options	1,545	3,261	4,092	4,102
Issuance for employee stock purchase plan		203		358
Shares withheld for employee taxes upon vesting of RSUs and PSUs	(511)	(3,382)	(421)
Shares withheld for employee taxes upon vesting of RSUs and PSUs				(3,508)
Share repurchases		5,000
Stock-based compensation	5,692	6,135	6,516	6,879
Balance at end of period	520,038	513,312	492,384	482,197	520,038	492,384
Additional Paid-In Capital | Adjustment.
Balance at beginning of period				(44,777)		(44,777)
Treasury Stock, at cost
Balance at beginning of period	$ (47,861)	$ (42,861)			$ (42,861)
Balance at beginning of period, shares	(2,457,849)	(2,150,717)			(2,150,717)
Share repurchases		$ (5,000)
Share repurchases (in shares)		(307,132)
Balance at end of period	$ (47,861)	$ (47,861)			$ (47,861)
Balance at end of period, shares	(2,457,849)	(2,457,849)			(2,457,849)
Accumulated Deficit
Balance at beginning of period	$ (269,411)	$ (256,342)	(312,197)	(333,147)	$ (256,342)	(333,147)
Net (loss) income	(5,191)	(13,069)	72,843	15,662
Balance at end of period	$ (274,602)	$ (269,411)	$ (239,354)	(312,197)	$ (274,602)	(239,354)
Accumulated Deficit | Adjustment.
Balance at beginning of period				$ 5,288		$ 5,288