Reorganization and Fresh Start Accounting - Reorganization Adjustments to Common Stock and Additional Paid in Capital (Details) - USD ($) shares in Thousands, $ in Thousands		1 Months Ended
	Feb. 05, 2021	Feb. 05, 2021	Mar. 31, 2021	Dec. 31, 2020
Reorganization, Chapter 11 [Line Items]
Shares issued upon emergence (in shares)	50,000
Par value of 50 million shares of new common stock issued	$ 1	$ 1	$ 1	$ 2,511
Additional paid-in capital	1,018,767	1,018,767	1,020,785	814,796
Total Successor equity issued on the Effective Date	$ 1,018,768	$ 1,018,768	$ 1,002,562	$ (311,388)
Common Stock
Reorganization, Chapter 11 [Line Items]
Shares issued upon emergence (in shares)	50,000	50,000
Ordinary Shares
Reorganization, Chapter 11 [Line Items]
Additional paid-in capital	$ 875,931	$ 875,931
Warrant
Reorganization, Chapter 11 [Line Items]
Additional paid-in capital	$ 142,836	$ 142,836