Leases and Lease Commitments - Schedule of Amounts Recognized in Unaudited Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Apr. 23, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases, right of use asset	$ 41,812		$ 154,796
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets		Other Assets
Operating leases, lease liabilities current	$ (16,354)		$ (5,072)
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	us-gaap:OtherLiabilitiesCurrent		us-gaap:OtherLiabilitiesCurrent
Operating leases, lease liabilities noncurrent	$ (25,373)		$ (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, Statement of Financial Position [Extensible Enumeration]	us-gaap:OtherLiabilities		us-gaap:OtherLiabilities
Finance leases, right-of-use-asset	$ 167,019
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets		Other Assets
Current finance lease liabilities	$ (15,599)	$ (15,148)
Noncurrent finance lease liabilities	$ (152,457)	$ (158,919)