Fresh Start Accounting - Schedule of Fair Value Adjustments to Other assets (Detail) $ in Thousands	Apr. 23, 2021 USD ($)
Fresh Start Balance Sheet [Abstract]
Write-off of long-term contract assets	$ (10,029)
Fair value adjustment to set asset equal to ROU liability for other operating leases	(1,998)
Fair value adjustment to true-up other operating leases to reflect the IBR at the Effective Date	1,745
Change in other assets	$ (10,282)

Total fresh-start adjustment to other assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120604989&loc=SL2890621-112765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Name:	us-gaap_FreshStartAdjustmentIncreaseDecreaseOtherAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant