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Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Jan. 13, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Fair value of financial instruments |  |  |
Unamortized Debt Issuance Expense | $ 3,300 |  | $ 3,400
GSWC |  |  |
Fair value of financial instruments |  |  |
Unamortized Debt Issuance Expense | 3,100 |  | 3,200
Unsecured Private Placement Notes | GSWC |  |  |
Fair value of financial instruments |  |  |
Face amount of debt |  | $ 130,000 |
Mutual Funds | Fair Value, Inputs, Level 1 |  |  |
Fair value of financial instruments |  |  |
Long-term debt-GSWC | $ 30,600 |  | $ 27,500

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