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