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Derivative Activities - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
MMBTU
Dec. 31, 2021
t_per_M
Jun. 30, 2021
t_per_M
Contingent Consideration          
Derivative [Line Items]          
Derivative assets liabilities at fair value net     $ 16,000,000.0    
North Louisiana | Maximum | Contingent Consideration          
Derivative [Line Items]          
Potential Contractual Payout Of Contingent Consideration $ 90,000,000 $ 90,000,000.0 90,000,000.0    
Derivatives Excluding Basis Swaps And Freight Swaps          
Derivative [Line Items]          
Derivative assets liabilities at fair value net     18,000,000.0    
Commodity | Natural Gas Basis Swaps          
Derivative [Line Items]          
Derivative assets liabilities at fair value net     $ 3,700,000    
Volume Hedged | MMBTU     180,510,000    
Commodity | Propane Spread Swaps          
Derivative [Line Items]          
Derivative assets liabilities at fair value net     $ 794,000,000    
Freight | Swap | Fair Value, Inputs, Level 2          
Derivative [Line Items]          
Derivative assets liabilities at fair value net     $ 1,100,000    
Freight | Swap | Contracts Settle in 2021 | Fair Value, Inputs, Level 2 | Forecast          
Derivative [Line Items]          
Volume Hedged | t_per_M       10,000 5,000