Fresh Start Accounting - Cancellation of Predecessor Common Stock and Treasury Stock, and Changes in Predecessors Additional Paid In Capital (Details) $ in Thousands	Nov. 19, 2020 USD ($)
Reorganizations [Abstract]
Cancellation of accumulated deficit	$ (3,086,292)
Cancellation of common stock	3,233
Cancellation of treasury stock	(36,637)
Equity-based compensation for vesting of awards classified as equity	12,055
Issuance of Warrants to Predecessor common stockholders	(23,805)
Net impact to Predecessor additional paid-in capital	$ (3,131,446)

Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123466302&loc=d3e4724-112606

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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