Debt - Additional Information (Details) - USD ($)	Feb. 05, 2021	Mar. 31, 2022
Interest Payable In Cash | Second Lien Notes Indenture
Debt Instrument [Line Items]
Debtor-in-possession financing, Interest rate on borrowings	11.00%
Interest Payable Half In Cash And Half By Issuing P I K Notes | Second Lien Notes Indenture
Debt Instrument [Line Items]
Debtor-in-possession financing, Interest rate on borrowings	13.00%
Interest Payable By Issuing P I K Notes | Second Lien Notes Indenture
Debt Instrument [Line Items]
Debtor-in-possession financing, Interest rate on borrowings	15.00%
Participants In The Rights Offering | Ordinary Shares | Second Lien Notes Indenture
Debt Instrument [Line Items]
Plan of reorganization, shares issued, subscription price	$ 200,000,000
Secured notes | Second Lien Notes Indenture
Debt Instrument [Line Items]
Debtor-in-possession financing, amount arranged	216,000,000
Debtor-in-possession financing, backstop fee	$ 16,000,000
Debt redemption rice, percentage of principal amount redeemed	106.00%
Debt redemption, change of control period	120 days
Credit facility | Line of Credit | Exit Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, amount arranged	$ 675,000,000
Debtor-in-possession financing, borrowings outstanding	$ 177,500,000	$ 0
Debtor-in-possession financing, increase of basis spread on variable rate	5000.00%
Debtor-in-possession financing, basis spread on variable rate, additional increase under conditions	5000.00%
Debt restrictive covenants, maximum available cash after borrowings	$ 100,000,000
Debt covenant, consolidated leverage ratio (maximum)	5.50
Debt restrictive covenants, outstanding borrowing	$ 610,000,000
Debt restrictive covenants, asset coverage ratio	2.00
Debt mandatory prepayments term, available cash benchmark	$ 150,000,000
Debt financial maintenance covenant, ratio of asset coverage aggregate rig value to aggregate principal amount of loans and letters of credit outstanding	2.00
Credit facility | Line of Credit | Exit Credit Agreement | LIBOR
Debt Instrument [Line Items]
Debtor-in-possession financing, increase of basis spread on variable rate	1.00%
Credit facility | Line of Credit | Debt Covenant Period One | Exit Credit Agreement
Debt Instrument [Line Items]
Debt financial maintenance covenant, ratio of adjusted EBITDA to cash interest expense	2.00
Credit facility | Line of Credit | Debt Covenant Period Two | Exit Credit Agreement
Debt Instrument [Line Items]
Debt financial maintenance covenant, ratio of adjusted EBITDA to cash interest expense	2.25
Credit facility | Line of Credit | LIBOR | Exit Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, increase of basis spread on variable rate	4.75%
Credit facility | Line of Credit | Base Rate | Exit Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, basis spread on variable rate	3.75%
Credit facility | Line of Credit | Fed Funds Effective Rate | Exit Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, increase of basis spread on variable rate	0.50%
Credit facility | Letters of credit
Debt Instrument [Line Items]
Debtor-in-possession financing, letters of credit outstanding		13,500,000
Credit facility | Letters of credit | Exit Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, letters of credit outstanding	$ 8,800,000
Credit facility | Unsecured Debt
Debt Instrument [Line Items]
Debtor-in-possession financing, letters of credit outstanding		$ 6,300,000
Letters of credit | Line of Credit | Exit Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, amount arranged	$ 67,500,000