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Fair Value of Financial Instruments - Schedule of Outstanding Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair value of financial instruments
Unamortized Debt Issuance Expense	$ 3,200
Reported Value Measurement
Fair value of financial instruments
Long-term Debt, Fair Value	450,373	$ 415,788
Estimate of Fair Value Measurement
Fair value of financial instruments
Long-term Debt, Fair Value	416,999	490,852
GOLDEN STATE WATER COMPANY
Fair value of financial instruments
Unamortized Debt Issuance Expense	3,000
GOLDEN STATE WATER COMPANY | Reported Value Measurement
Fair value of financial instruments
Long-term Debt, Fair Value	415,373	415,788
GOLDEN STATE WATER COMPANY | Estimate of Fair Value Measurement
Fair value of financial instruments
Long-term Debt, Fair Value	$ 384,685	$ 490,852

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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