Commitments - Narrative (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2024 unit	Dec. 31, 2024 USD ($) unit
BVES
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of renewable energy credits that would be purchased | unit		578,000
Bundled Purchased Renewable Energy Credits Number | unit		587,000
Purchased Renewable Energy Credits Number Delivered in 2023 | unit		60,000
Purchased Renewable Energy Credits Number Delivered in 2024 | unit	15,000
BVES | Renewables Portfolio Standard
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, term of contract		10 years
BVES | Renewables Portfolio Standard (Bundled Product)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, term of contract		11 years
Water Supply | GSWC
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Obligation		$ 2,294
Water Supply | GSWC | Various third parties
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Remaining amount of commitment		1,100
Water Supply | GSWC | Other various third parties
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Obligation		1,200
Electric Power Purchase Commitments | BVES
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Obligation		41,100
Electric Renewable Energy Credit Purchase Commitments | BVES
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Obligation		$ 8,900
Minimum | BVES
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, Term of Contract		3 years
Minimum | BVES | Purchase power contract
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, Term of Contract		3 years
Maximum | BVES
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, Term of Contract		5 years
Maximum | BVES | Purchase power contract
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, Term of Contract		5 years