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Regulatory Matters 3 (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Regulatory matters:
Other Liabilities, Current	$ 10,731	$ 15,109
GSWC
Regulatory matters:
Under (over) collection	(28,340)	2,042
Other Liabilities, Current	9,432	14,705
Other Regulatory Assets Net [Member] | GSWC
Regulatory matters:
Under (over) collection	15,656	16,393
Low income rate assistance balancing accounts | GSWC
Regulatory matters:
Under (over) collection	2,784	5,972
Pension Costs and Other Postretirement Benefit Costs | GSWC
Regulatory matters:
Regulatory asset authorized under settlement	36,200
Under (over) collection	33,124	$ 33,019
Two-way pension balancing account | Pension Costs and Other Postretirement Benefit Costs | GSWC
Regulatory matters:
Regulatory asset authorized under settlement	3,000
Two-way pension balancing account | Purchase, production, distribution and sale of water | Pension Costs and Other Postretirement Benefit Costs | GSWC
Regulatory matters:
Regulatory asset authorized under settlement	(2,042)
Two-way pension balancing account | Electric | Pension Costs and Other Postretirement Benefit Costs | GSWC
Regulatory matters:
Regulatory asset authorized under settlement	$ (991)

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The net amount of all regulatory assets less all regulatory liabilities as of the end of the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

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