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Long-Term Debt - Schedule Of Long-Term Debt Instruments (Parenthetical) (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) Contract	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt		$ 399,856	$ 140,000	$ 165,000
Repayment of long-term debt	$ 250,000
Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	400,000
First Mortgage [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.00%
2032 [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Pollution Control Bonds		$ 66,700
2034 [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Pollution Control Bonds		$ 17,000
4.00% Due in 2052 [Member] | First Mortgage [Member]
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 400,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Maturity Year	2052
4.00% Due in 2052 [Member] | First Mortgage [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Number of interest rate swaps settled | Contract	13
Notional Amount	$ 140,000
Net payments from settlement of derivatives	$ 17,000

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Noncurrent portion of a debt security issued by a state, certain agencies or authorities, a local government, or development corporation to finance the construction of air- or water-pollution control facilities or sewage or solid waste disposal facilities pursuant to federal law. The bonds are backed by the credit of the beneficiary of the financing rather than the credit of the issuer.

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