Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets (Detail)

v3.21.2
Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current $ 4,909 $ 75,506
Derivative liabilities 63,089 85,106
Derivative Asset, Noncurrent 2,152 25,449
Derivative Liability, Noncurrent 21,416 28,434
Derivative Liability 84,505 113,540
Derivative Asset 7,061 100,955
Commodity contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liability 74,900  
Commodity contracts | Current Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current 4,909 75,506
Derivative liabilities 60,593 81,451
Commodity contracts | Noncurrent Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Noncurrent 2,152 25,449
Derivative Liability, Noncurrent 21,416 26,789
Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Derivative Liability 2,500  
Interest Rate Swap | Current Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current 0 0
Derivative liabilities 2,496 3,655
Interest Rate Swap | Noncurrent Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Noncurrent 0 0
Derivative Liability, Noncurrent 0 1,645
Fair Value, Measurements, Recurring | Commodity contracts    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current 4,909 75,506
Derivative liabilities 60,593 (81,451)
Derivative Asset, Noncurrent 2,152 25,449
Derivative Liability, Noncurrent 21,416 $ 26,789
Fair Value, Measurements, Recurring | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Derivative liabilities 2,496  
Derivative Liability, Noncurrent $ 0