Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current $ 13,093 $ 75,506
Derivative liabilities 44,328 85,106
Derivative Asset, Noncurrent 5,269 25,449
Derivative Liability, Noncurrent 14,914 28,434
Derivative Liability 59,242 113,540
Derivative Asset 18,362 100,955
Commodity contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liability 36,500  
Commodity contracts | Current Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current 13,093 75,506
Derivative liabilities 40,598 81,451
Commodity contracts | Noncurrent Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Noncurrent 5,269 25,449
Derivative Liability, Noncurrent 14,299 26,789
Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Derivative Liability 4,300  
Interest Rate Swap | Current Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current 0 0
Derivative liabilities 3,730 3,655
Interest Rate Swap | Noncurrent Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Noncurrent 0 0
Derivative Liability, Noncurrent 615 1,645
Fair Value, Measurements, Recurring | Commodity contracts    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Current 13,093 75,506
Derivative liabilities 40,598 (81,451)
Derivative Asset, Noncurrent 5,269 25,449
Derivative Liability, Noncurrent 14,299 $ 26,789
Fair Value, Measurements, Recurring | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Derivative liabilities 3,730  
Derivative Liability, Noncurrent $ 615