Senior Notes (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Feb. 17, 2021
The Notes \| Senior Notes [Member]
Senior Notes [Line Items]
Additional percentage of principal amount redeemed	100.00%
Percentage of principal amount purchased	101.00%
Debt Issuance Costs [Member]
Senior Notes [Line Items]
Unamortized Debt Issuance Expense	$ 15,300
Senior Notes [Member]
Senior Notes [Line Items]
Initial borrowing in senior notes	450,000	$ 450,000
Unamortized Debt Issuance Expense	$ 11,600	$ 15,700
Debt Instrument, Redemption Price, Percentage	106.375%
Debt Instrument, Interest Rate, Stated Percentage		6.375%
Senior note redemption price, percent	40.00%

Debt Instrument, Redemption Price, Additional Percentage of Principal Amount Redeemed

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Debt Instrument, Redemption Price, Percentage of Principal Amount Purchased

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Senior Notes [Line Items]

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Percentage of principal amount of debt redeemed.

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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No definition available.

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