Derivative Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current	$ 0	$ 0	$ 400
Unrealized Gain (Loss) on Derivatives		1,800	600	$ 3,500
Notional Amount of Nonderivative Instruments	50,000	50,000
Derivative assets, at fair value	$ 600	$ 600	1,000
Interest Rate Swap Rate, High Range [Member]
Derivative [Line Items]
Fixed Swap Rate	3.97%	3.98%
Not Designated as Hedging Instrument [Member] | Propane Swap Agreement
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		$ 0	0	100
Derivatives designated as fair value hedges | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		800	500	0
Derivatives designated as fair value hedges | Mark To Market Energy Assets | Propane Swap Agreement
Derivative [Line Items]
Derivative assets, at fair value	$ 600	600	700
Derivatives designated as fair value hedges | Mark To Market Energy Assets | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative assets, at fair value	100	100	300
Derivatives designated as fair value hedges | Mark-to-market energy liabilities | Propane Swap Agreement
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current	0	0	1,100
Derivatives designated as fair value hedges | Mark-to-market energy liabilities | Interest Rate Swap [Member]
Derivative [Line Items]
Energy Marketing Contract Liabilities, Current	100	100	200
Sharp Energy Inc [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months		500
Other Payables to Broker-Dealers and Clearing Organizations	$ 1,900	1,900	2,100
Cost of Sales | Derivatives designated as fair value hedges | Propane Swap Agreement
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		$ 1,300	$ (1,100)	$ 3,800