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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