Leases and Lease Commitments - Schedule of Amounts Recognized in Unaudited Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases, right of use asset	$ 44,727	$ 154,796
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List	Other assets	Other assets
Operating leases, lease liabilities current	$ (16,267)	$ (5,072)
Operating Lease Liability Current Statement Of Financial Position Extensible List	Accrued liabilities	Accrued liabilities
Operating leases, lease liabilities noncurrent	$ (28,545)	$ (23,476)
Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List	Other liabilities	Other liabilities
Operating leases, lease liabilities subject to compromise		$ (112,646)
Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List	Liabilities subject to compromise	Liabilities subject to compromise
Finance leases, right-of-use-asset	$ 171,253
Finance leases, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Drilling and other property and equipment, net of accumulated depreciation
Current finance lease liabilities	$ (15,338)
Noncurrent finance lease liabilities	$ (156,489)