Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net loss	$ (23,122)	$ (18,067)	$ (20,958)	$ 82,603	$ (62,147)	$ (53,079)
Dilutive Securities, Effect on Basic Earnings Per Share	0			1,258	0	0
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted	$ (23,122)			$ 83,861	$ (62,147)	$ (53,079)
Shares used in computing net loss per common share, Basic	145,820,000			107,309,000	144,558,000	106,974,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0			51,000	0	0
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	0			10,192,000	0	0
Weighted Average Number of Shares Outstanding, Diluted	145,820,000			117,552,000	144,558,000	106,974,000
Net income (loss) per common share, Basic	$ (0.16)			$ 0.77	$ (0.43)	$ (0.50)
Earnings Per Share, Diluted	$ (0.16)			$ 0.71	$ (0.43)	$ (0.50)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	10,615			11,773	10,615	11,859