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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT - Basis of Presentation Narrative (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Nov. 06, 2023 | Jan. 13, 2023 | Apr. 22, 2022
Note payable to banks |  |  |  |  |  |
Line of credit facility, current borrowing capacity |  |  |  | $ 165,000,000 |  |
Exercise of stock options and other issuance of Common Shares | 18,371 | 25,956 | 47,182 |  |  |
Exercise of stock options and other issuance of Common Shares | $ 0 | $ 0 | $ 0 |  |  |
GSWC |  |  |  |  |  |
Note payable to banks |  |  |  |  |  |
Exercise of stock options and other issuance of Common Shares | 1 | 0 | 0 |  |  |
Exercise of stock options and other issuance of Common Shares | $ 10,000,000 |  |  |  |  |
Debt Instrument, Face Amount | $ 130,000,000 |  |  |  |  |
Common Stock |  |  |  |  |  |
Note payable to banks |  |  |  |  |  |
Exercise of stock options and other issuance of Common Shares | 19,000 | 26,000 | 47,000 |  |  |
Exercise of stock options and other issuance of Common Shares | $ 0 | $ 0 | $ 0 |  |  |
Common Stock | GSWC |  |  |  |  |  |
Note payable to banks |  |  |  |  |  |
Exercise of stock options and other issuance of Common Shares | 1 |  |  |  |  |
Exercise of stock options and other issuance of Common Shares | $ 10,000,000 |  |  |  |  |
Related Party |  |  |  |  |  |
Note payable to banks |  |  |  |  |  |
Line of credit facility, current borrowing capacity | 30,000,000 |  |  |  |  |
Financing receivable, after allowance for credit loss | 0 | 26,000,000 |  |  |  |
Notes Payable | $ 0 | $ 0 |  |  |  |
Unsecured Private Placement Notes | GSWC |  |  |  |  |  |
Note payable to banks |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 130,000,000 |
Maximum | Revolving Credit Facility |  |  |  |  |  |
Note payable to banks |  |  |  |  |  |
Line of credit facility, current borrowing capacity |  |  |  |  |  | $ 280,000,000

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