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Revenues Contract assets and Contract Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Contract with Customer, Asset and Liability [Line Items] |  |
Contract with Customer, Liability, Revenue Recognized | $ 7,300 |
Revenue, Remaining Performance Obligation, Amount | 3,200,000 |
American States Utility Services [Member] |  |
Contract with Customer, Asset and Liability [Line Items] |  |
Government Contract Receivable, Unbilled Amounts | 10,467 | $ 5,696
Government Contract Receivable | 64,819 | 61,126
Contract assets | 15,631 | 24,447
Contract liabilities | $ 11,167 | $ 7,530
Minimum | American States Utility Services [Member] |  |
Contract with Customer, Asset and Liability [Line Items] |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 36 years |
Maximum [Member] | American States Utility Services [Member] |  |
Contract with Customer, Asset and Liability [Line Items] |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 50 years |
Contracted services: | American States Utility Services [Member] |  |
Contract with Customer, Asset and Liability [Line Items] |  |
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases | 50 years |

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- Definition Represents the period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 + Details
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- Definition The amount of receivables that are derived from government contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 310 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68054760&loc=d3e55295-109406 + Details
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