Short-Term Borrowings (Details)	1 Months Ended	3 Months Ended
	Feb. 28, 2021 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2023 USD ($)	Oct. 31, 2023	Dec. 31, 2022 USD ($)
Short-term Debt [Line Items]
Ratio of Indebtedness to Net Capital		0.65			0.70
Notional Amount of Nonderivative Instruments	$ 40,000,000	$ 50,000,000	$ 30,000,000
Line of Credit Facility, Remaining Borrowing Capacity		197,600,000
Short-term borrowing		$ 170,355,000		$ 179,853,000
Short-term Debt, Weighted Average Interest Rate, at Point in Time		5.83%
Draws on letters of credit		$ 7,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.54%
Revolving Line of Credit, Short-term
Short-term Debt [Line Items]
Debt Instrument, Fee		10
Debt Instrument, Interest Rate, Stated Percentage		8000.00%
Aggregate Investment, Maximum		$ 175,000,000				$ 150,000,000
Ownership Interest		0.50
Interest Rate Credit Adjustment		10
Line of Credit Facility, Interest Rate Description		1.05 percent
Line of Credit Facility [Line Items]
Line Of Credit Facility Interest Rate Description		$ 0.01
Line Of Credit Facility Interest Rate Description 2		$ 0.0005
Revolving Line of Credit, Long-term
Short-term Debt [Line Items]
Debt Instrument, Fee		10
Debt Instrument, Interest Rate, Stated Percentage		10000.00%
Interest Rate Credit Adjustment		10
3.48% note, due May 31, 2038 [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.48%
Committed Line of Credit Facility Two [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 0.75 percent
Committed Line of Credit Facility Three [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		Lender's base rate, plus 0.75 percent
Committed Line of Credit Facility Five [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		Lender's base rate, plus 0.85 percent
Committed Line of Credit Facility Four [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 1.125 percent
Committed Line of Credit Facility Six [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility Seven [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility Eight [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility Nine [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 1.75 percent
Committed Line of Credit Facility One [Member]
Short-term Debt [Line Items]
Debt Instrument, Description of Variable Rate Basis		LIBOR rate, plus 0.75 percent
Revolving Credit Facility
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 375,000,000
Interest Rate Swap Rate, Low Range [Member]
Short-term Debt [Line Items]
Fixed Swap Rate						0.20%
Interest Rate Swap Rate, High Range [Member]
Short-term Debt [Line Items]
Fixed Swap Rate		3.98%		0.17%		0.205%
Florida City Gas | Regulated Energy [Member]
Short-term Debt [Line Items]
Bridge Loan		$ 965,000,000
Line of Credit Facility [Line Items]
Bridge Loan		$ 965,000,000