Net (Loss) Income Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator for basic and diluted income (loss) per common share:
Net income (loss)	$ 97,864	$ (103,994)	$ 104,346
Less: Net income allocated to unvested participating restricted stock	(2,295)	(420)	(3,532)
Net income (loss) available to common stockholders	95,569	(104,414)	100,814
Effect of unvested participating restricted stock	13	0	33
Numerator - income (loss) available to common shareholders - diluted	$ 95,582	$ (104,414)	$ 100,847
Denominator:
Weighted average outstanding shares of common stock - basic (in shares)	16,799	16,230	16,934
Stock options (in shares)	91	0	311
Weighted average outstanding shares of common stock - diluted (in shares)	16,890	16,230	17,245
Net income (loss) per common share:
Basic (in dollars per share)	$ 5.69	$ (6.43)	$ 5.95
Diluted (in dollars per share)	$ 5.66	$ (6.43)	$ 5.85