Acquisitions and Divestitures - Summary of Purchase Price Allocation (Parenthetical) (Detail) - Legacy Amplify, Midstates and Midstates Holdings, Inc. [Member]	Aug. 06, 2019 $ / shares shares
Business Acquisition [Line Items]
Business acquisition, common shares issued \| shares	20,415,005
Business acquisition, share price \| $ / shares	$ 4.12

Number of shares of equity interests issued or issuable to acquire entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration