Basis of Presentation (Reconciliation of Weighted Average Shares Table) (Details) - shares shares in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020		Jun. 30, 2021	Jun. 30, 2020
Weighted average common shares outstanding - diluted	[1]	50,999	495,245		50,661	494,752
Weighted average common shares outstanding - basic		50,999	495,245		50,661	494,752
Restricted stock units		0	0		0
Warrants		0	0		0	0
Restricted stock and performance-based equity awards		0	0		0	0
Convertible senior notes		0	0	[2]	0	0	[2]
Net Income Scenario
Weighted average common shares outstanding - diluted		54,300	587,100		52,700	586,600

[1] If the Company had recognized net income, the weighted average diluted shares outstanding would have been 54.3 million and 587.1 million for the three months ended June 30, 2021 and 2020, respectively, and 52.7 million and 586.6 million for the six months ended June 30, 2021 and 2020, respectively.

[2] In connection with the Company’s emergence from bankruptcy on September 18, 2020, all outstanding convertible senior notes were fully extinguished.(2)If the Company had recognized net income, the weighted average diluted shares outstanding would have been 54.3 million and 587.1 million for the three months ended June 30, 2021 and 2020, respectively, and 52.7 million and 586.6 million for the six months ended June 30, 2021 and 2020, respectively.