Earnings (Loss) per Share - Calculation of Weighted Average Common Shares Outstanding used in Computation of Diluted Earnings Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Earnings (Loss)	$ 116,738	$ (277,353)	$ (449,305)
Weighted Average Shares, basic (in shares)	36,393,000	35,689,000	35,427,000
Loss Per Share, Basic (in dollars per share)	$ 3.21	$ (7.77)	$ (12.68)
Effect of dilutive securities
Restricted stock awards, Net Earnings (Loss)	$ 0	$ 0	$ 0
Restricted stock awards, Weighted Average Shares (in shares)	58,000	0	0
Restricted share units, Net Earnings (Loss)	$ 0	$ 0	$ 0
Restricted share units, Weighted Average Shares (in shares)	689,000	0	0
Performance share units, Net Earnings (Loss)	$ 0	$ 0	$ 0
Performance share units, Weighted Average Shares (in shares)	83,000	0	0
Stock Options, Net Earnings (Loss)	$ 0	$ 0	$ 0
Stock Options, Weighted Average Shares (in shares)	48,000	0	0
Warrants, Net Earnings (Loss)	$ 0	$ 0	$ 0
Warrants, Weighted Average Shares (in shares)	0	0	0
Net (Loss) Income, Diluted	$ 116,738	$ (277,353)	$ (449,305)
Weighted Average Shares, Diluted (in shares)	37,271,000	35,689,000	35,427,000
(Loss) Earnings Per Share, Diluted (in dollars per share)	$ 3.13	$ (7.77)	$ (12.68)
Warrants
Effect of dilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)		0	0
Performance Share Units
Effect of dilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)		0	0
Restricted Stock
Effect of dilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)		0	0