v3.26.1
Derivative Instruments - Fair Values of Derivative Contracts Recorded in Condensed Consolidated Balance Sheet (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Energy Marketing Contracts Assets, Current $ 0.8 $ 0.0
Energy Marketing Contract Liabilities, Current 0.2 0.8
Energy Marketing Contract Liabilities, Total [1] 0.7 1.4
Energy Marketing Contracts Assets, Total [2] 0.9 0.0
Propane Swap Agreement [Member]    
Derivatives, Fair Value [Line Items]    
Energy Marketing Contracts Assets, Current 0.9 0.0
Energy Marketing Contract Liabilities, Current 0.0 0.7
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member]    
Derivatives, Fair Value [Line Items]    
Energy Marketing Contract Liabilities, Current $ 0.7 $ 0.7
[1]
(1) Derivative liabilities, at fair value, include $0.2 million in current liabilities in the condensed consolidated balance sheet at March 31, 2026 and $0.8 million at December 31, 2025, with the remainder of the balances classified as long-term.
[2]
 (1) Derivative assets, at fair value, include $0.8 million in current assets in the condensed consolidated balance sheet at March 31, 2026, with the remainder of the balances classified as long-term. There were no current derivative asset at December 31, 2025,