Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020
Minimum [Member]
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Term of Contract	2 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Term of Contract	5 years
Other Capitalized Property Plant and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Other Capitalized Property Plant and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Gas Gathering and Processing Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	15 years
Gas Gathering and Processing Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years