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Debt - Credit Facility - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 02, 2018
Nov. 17, 2020
Dec. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Nov. 11, 2020
Nov. 08, 2019
Nov. 07, 2019
Aug. 06, 2019
Aug. 05, 2019
Line Of Credit Facility [Line Items]                    
Debt instrument interest rate description     the applicable margin for LIBOR loans and LIBOR Market loans increased from 200 to 300 basis points to 250 to 350 basis points.              
Letters of credit outstanding     $ 0.0              
Revolving Credit Facility [Member]                    
Line Of Credit Facility [Line Items]                    
Borrowing base   $ 260.0 $ 260.0     $ 260.0 $ 450.0 $ 530.0 $ 530.0 $ 425.0
Maturity date     Nov. 02, 2023              
LIBOR rate interest period 1 month                  
Unsused line of credit, commitment fee percentage 0.50%                  
Debt Instrument, Covenant Description   modify the affirmative hedging covenant to include at least 65% and 45% hedge for calendar years 2021 and 2022 on a total proved developed producing reserves, respectively                
Monthly reduction of line of credit facility current borrowing capacity     $ 5.0              
Line of credit facility, covenant terms     suspend certain financial covenants for the quarter ended June 30, 2020              
Revolving Credit Facility [Member] | Amplify Acquisitionco Inc                    
Line Of Credit Facility [Line Items]                    
Pledge and security interest 100.00%                  
Revolving Credit Facility [Member] | Minimum [Member]                    
Line Of Credit Facility [Line Items]                    
Borrowing base     $ 285.0              
Current ratio 1.00%                  
Hedging Liabilities Noncurrent     30.00%              
Increase in percentage of priority lien assets     85.00%              
Line of credit facility decrease limit of cash and cash equivalents     $ 30.0              
Line of credit facility increase limit of transaction-related expense add-backs     5.0              
Revolving Credit Facility [Member] | Minimum [Member] | Scenario Forecast [Member]                    
Line Of Credit Facility [Line Items]                    
Hedging Liabilities Noncurrent       45.00% 65.00%          
Revolving Credit Facility [Member] | Minimum [Member] | Oil and Gas Properties [Member]                    
Line Of Credit Facility [Line Items]                    
Secured by percentage of mortgages 85.00%                  
Revolving Credit Facility [Member] | Minimum [Member] | Proved Developed and Producing Oil and Gas Properties [Member]                    
Line Of Credit Facility [Line Items]                    
Secured by percentage of mortgages 85.00%                  
Revolving Credit Facility [Member] | Maximum [Member]                    
Line Of Credit Facility [Line Items]                    
Borrowing base     $ 450.0              
Total debt to EBITDAX 4.00%                  
Hedging Liabilities Noncurrent     60.00%              
Increase in percentage of priority lien assets     90.00%              
Line of credit facility decrease limit of cash and cash equivalents     $ 25.0              
Line of credit facility increase limit of transaction-related expense add-backs     $ 20.0              
Revolving Credit Facility [Member] | Federal Funds Effective Rate [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on variable rate 0.50%                  
Revolving Credit Facility [Member] | LIBOR [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on variable rate 1.00%                  
Revolving Credit Facility [Member] | LIBOR [Member] | Minimum [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on variable rate 2.00%                  
Revolving Credit Facility [Member] | LIBOR [Member] | Maximum [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on variable rate 3.00%                  
Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on variable rate 1.00%                  
Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]                    
Line Of Credit Facility [Line Items]                    
Debt instrument, basis spread on variable rate 2.00%