Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net loss available to common shareholders	$ (33,123)	$ (62,802)	$ (20,520)	$ (54,118)
Weighted average common shares outstanding - Basic (in shares)	45,142	40,216	43,344	40,130
Dilutive effect of stock-based awards (in shares)	0	0	0	0
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	0	0	0	0
Weighted average common shares outstanding - Diluted (in shares)	45,142	40,216	43,344	40,130
Earnings (loss) per common share - Basic (in dollars per share)	$ (0.73)	$ (1.56)	$ (0.47)	$ (1.35)
Earnings (loss) per common share - Diluted (in dollars per share)	$ (0.73)	$ (1.56)	$ (0.47)	$ (1.35)