Fair Value Measurements - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Counterparty	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest and dividends	$ 261,000	$ 331,000	$ 739,000	$ 945,000
Mark-to-market gain (loss)	3,200,000	$ (3,500,000)	8,100,000	$ 2,200,000
Allowance for doubtful accounts on accounts receivable	308,000		$ 308,000		$ 308,000
Number of derivative counterparties | Counterparty			15
Number of counter parties that are participants in bank credit facility | Counterparty			10
Counterparties not in Facility | Payables
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net derivative asset	$ 5,800,000		$ 5,800,000
Number of counter parties | Counterparty			5
Measurement Input, Price Volatility | Weighted Average | Natural Gas | Swaptions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Implied volatilities			17.00%