Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator [Abstract]
Net (loss) income	$ (3,523)	$ (8,040)	$ (29,966)	$ 291,905
Denominator [Abstract]
Weighted-average basic shares outstanding (in shares)	71,111,000	70,915,000	71,085,000	70,640,000
Effect of dilutive securities (in shares)	0	0	0	1,458,000
Weighted-average diluted shares (in shares)	71,111,000	70,915,000	71,085,000	72,098,000
Basic (loss) earnings per share (in dollars per share)	$ (0.05)	$ (0.11)	$ (0.42)	$ 4.13
Diluted (loss) earnings per share (in dollars per share)	$ (0.05)	$ (0.11)	$ (0.42)	$ 4.05
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)	6,752,839	6,211,844	6,752,839	1,824,454