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v3.25.0.1

Long-Term Debt (Details) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 | Feb. 12, 2025 USD ($) | Jun. 05, 2024 USD ($) | Jan. 13, 2023 USD ($)
Debt Instrument [Line Items] |  |  |  |
Ratio of Indebtedness to EBITDA | 8 |  |  |
GSWC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 130.0
Ratio of indebtedness to net capital | 0.4754 |  |  |
Ratio of Indebtedness to EBITDA | 3.8 |  |  |
GSWC | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Ratio of indebtedness to net capital | 0.6667 |  |  |
Series A Senior Notes 5.12 Percent Due 2033 | GSWC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 100.0
Interest rate per annum (as a percent) |  |  |  | 5.12%
Interest rate (as a percent) |  |  |  | 5.12%
Private Placement Notes | GSWC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument Redemption Premium above Treasury Yield | 50.00% |  |  |
Series A Senior Notes 5.22 Percent Due 2038 | GSWC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 30.0
Interest rate per annum (as a percent) |  |  |  | 5.22%
Interest rate (as a percent) |  |  |  | 5.22%
Unsecured Private Placement Notes | GSWC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | $ 65.0 | $ 130.0
Interest rate per annum (as a percent) |  |  | 5.50% |
Interest rate (as a percent) |  |  | 5.50% |
Debt due Feb 2030 | BVES | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Face Amount |  | $ 50.0 |  |
Interest rate per annum (as a percent) |  | 6.12% |  |
Interest rate (as a percent) |  | 6.12% |  |

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