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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% |  |

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