Other Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Subsequent Event [Line Items]
Intercompany Agreements, Description	three years
Debt Service Coverage Ratio	1.25
Time to cure ratio	5 days
Ratio based on average number of prior quarters	6
Funds from operations interest coverage ratio minimum times	2
Total debt to capital maximum	65
Number Of Years to Collect Benefits	20 years
Total purchase obligations for 2018	$ 86,040,000
Total purchase obligations for 2019 - 2020	105,082,000
Total purchase obligations for 2021 - 2022	83,851,000
Total purchase obligations thereafter	141,287,000
Aggregate guaranteed amount	35,000,000
Guarantor Obligations, Current Carrying Value	24,300,000
Amount of letter of credit to our current primary insurance company	7,000,000
Loss Contingencies [Line Items]
Environmental liabilities	$ 2,607,000	$ 3,272,000
Maximum [Member]
Subsequent Event [Line Items]
Number Of Years to Collect Benefits	15 years
Maximum [Member] | Seaford
Loss Contingencies [Line Items]
Environmental Exit Costs, Reasonably Possible Additional Loss	$ 900,000
Specific Purpose
Subsequent Event [Line Items]
Guarantor Obligations, Current Carrying Value	4,000,000
Florida Public Utilities Company [Member]
Loss Contingencies [Line Items]
Environmental liabilities	$ 3,600,000	$ 4,300,000