XML 76 R65.htm IDEA: XBRL DOCUMENT v3.21.2
Fair Value Measurements - Additional Information (Detail)
 3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Jun. 30, 2021
USD ($)
Counterparty
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Interest and dividends $ 118,000 $ 124,000   $ 227,000 $ 227,000  
Mark-to-market gain (loss) 2,300,000 $ 7,600,000   4,300,000 $ (3,000,000.0)  
Impairment of proved properties and other assets       0    
Allowance for doubtful accounts on accounts receivable 393,000     $ 393,000   $ 3,004,000
Number of derivative counterparties | Counterparty       19    
Number of counter parties that are not participants in bank credit facility | Counterparty       5    
One Counterparty Not in Facility            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Net derivative asset 5,600,000     $ 5,600,000    
Four Counterparties Not in Facility            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Net derivative asset $ 9,700,000     9,700,000    
North Louisiana | Fair Value, Inputs, Level 2            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Impairment of proved properties and other assets     $ 77,000,000.0      
Maximum | North Louisiana | Contingent Consideration            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Potential contractual payout of contingent consideration       $ 75,000,000.0    
Measurement Input, Price Volatility | Weighted Average            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Implied volatilities       36.00%    
Measurement Input, Price Volatility | Weighted Average | Swaptions | Crude Oil1            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Implied volatilities       31.00%    
Measurement Input, Price Volatility | Weighted Average | Swaptions | Natural Gas            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Implied volatilities       23.00%    
Measurement Input, Price Volatility | Minimum            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Implied volatilities       29.00%    
Measurement Input, Price Volatility | Maximum            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Implied volatilities       50.00%