Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic net (loss) income per share:
Net (loss) income	$ (145)	$ (272)	$ 39,421	$ 37,557
Weighted-average common shares outstanding during period (in shares)	30,857,617	33,468,556	31,621,039	43,323,602
Basic net (loss) income per share (in USD per share)	$ 0	$ (0.01)	$ 1.25	$ 0.87
Diluted net (loss) income per share:
Net (loss) income	$ (145)	$ (272)	$ 39,421	$ 37,557
Weighted-average common shares outstanding during period (in shares)	30,857,617	33,468,556	31,621,039	43,323,602
Plus: Common stock equivalents associated with liability-based stock option awards (in shares)	0	0	2,369,732	2,705,053
Diluted shares outstanding (in shares)	30,857,617	33,468,556	33,990,771	46,028,655
Diluted net (loss) income per share (in USD per share)	$ 0	$ (0.01)	$ 1.16	$ 0.82