Earnings per Share - Income and Share Data Used In Basic and Diluted Earnings Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2018	Nov. 19, 2018	Dec. 31, 2019	Dec. 31, 2017
Numerator:
Net loss, basic and diluted	$ (27,484)	$ (2,154,877)	$ (556,465)	$ (525,166)
Denominator:
Weighted-average shares outstanding, basic	75,010	21,359	75,011	21,315
Weighted-average shares outstanding, diluted	75,010	21,359	75,011	21,315
Loss per share:
Basic (in dollars per share)	$ (0.37)	$ (100.89)	$ (7.42)	$ (24.64)
Diluted (in dollars per share)	$ (0.37)	$ (100.89)	$ (7.42)	$ (24.64)