Acquisitions and Divestitures - Summary of Unaudited Pro Forma Financial Information (Detail) - Legacy Amplify, Midstates and Midstates Holdings, Inc. [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares
Business Acquisition [Line Items]
Revenues | $	$ 336,326
Net income (loss) | $	$ (22,926)
Earnings per share:
Basic | $ / shares	$ (0.78)
Diluted | $ / shares	$ (0.78)