Earnings Per Share - Computation of Net Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, $ 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
EARNINGS PER SHARE
Net (loss) income	$ (5,191)	$ (13,069)	$ 72,843	$ 15,662	$ (18,260)	$ 88,505
Adjustment for interest expense recognized on convertible senior notes:			1,168			2,333
Net (loss) income - diluted	$ (5,191)		$ 74,011		$ (18,260)	$ 90,838
Weighted-average shares outstanding - basic	34,001,553		35,302,608		33,838,638	35,128,144
Weighted-average shares outstanding - diluted (in shares)	34,001,553		41,286,853		33,838,638	41,251,749
(Loss) earnings per share - basic (in dollars per share)	$ (0.15)		$ 2.06		$ (0.54)	$ 2.52
(Loss) earnings per share - diluted (in dollars per share)	$ (0.15)		$ 1.79		$ (0.54)	$ 2.20
Stock options
EARNINGS PER SHARE
Effect of dilutive securities:			580,329			624,602
Restricted stock units
EARNINGS PER SHARE
Effect of dilutive securities:			302,737			384,908
Employee stock purchase program
EARNINGS PER SHARE
Effect of dilutive securities:			125			1,149
Warrants
EARNINGS PER SHARE
Effect of dilutive securities:			175,920			187,812
Convertible senior notes
EARNINGS PER SHARE
Effect of dilutive securities:			4,925,134			4,925,134