Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.20.4
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