Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net loss available to common shareholders	$ (1,869)	$ (25,357)	$ (22,389)	$ (79,475)
Weighted average common shares outstanding - Basic (in shares)	45,240	40,337	43,983	40,199
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)	45,240	40,337	43,983	40,199
Earnings (loss) per common share - Basic (in dollars per share)	$ (0.04)	$ (0.63)	$ (0.51)	$ (1.98)
Earnings (loss) per common share - Diluted (in dollars per share)	$ (0.04)	$ (0.63)	$ (0.51)	$ (1.98)