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Regulatory Matters: CPUC Rehearing Matter and Procurement Audits (Details) - GOLDEN STATE WATER COMPANY - USD ($) $ in Thousands	Sep. 30, 2019	May 30, 2019	Dec. 31, 2018
Regulatory matters:
Capital expenditure approved	$ (5,264)		$ (28,340)
Various refunds to customers
Regulatory matters:
Capital expenditure approved	$ (7,921)		$ (7,517)
Authorized Capital Infrastructure [Member]
Regulatory matters:
Capital expenditure approved		$ 334,500
Deferred Project Costs [Member]
Regulatory matters:
Capital expenditure approved		$ 20,400

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

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