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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, 2023 USD ($) Contract | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |
Proceeds from issuance of long-term debt |  | $ 250,000 | $ 399,856 | $ 140,000
Repayments of short-term debt |  | $ 150,000 |  |
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 |  |
5.66% Due in 2053 [Member] | First Mortgage [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from issuance of long-term debt | $ 250,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.66% |  |  |
Debt instrument maturity year | 2053 |  |  |
5.66% Due in 2053 [Member] | First Mortgage [Member] | Interest Rate Swap [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Number of interest rate swaps settled | Contract | 4 |  |  |
Notional Amount | $ 40,000 |  |  |
Net payments from settlement of derivatives | $ 7,500 |  |  |

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