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v3.19.3.a.u2

Military Privatization (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Military Privatization |  |  |  |  |  |  |  |  |  |  |  |
Contract liabilities (Note 2) | $ 11,167 |  |  |  | $ 7,530 |  |  |  | $ 11,167 | $ 7,530 |  |
Receivables from the U.S. government: |  |  |  |  |  |  |  |  |  |  |  |
Less: allowance for doubtful accounts | (916) |  |  |  | (951) |  |  |  | (916) | (951) | $ (1,041) | $ (764)
Pretax income |  |  |  |  |  |  |  |  |  |  |  |
Increase in pretax operating income | $ 24,724 | $ 42,724 | $ 39,430 | $ 20,195 | $ 22,749 | $ 33,975 | $ 25,568 | $ 18,691 | $ 127,073 | 100,983 | 127,095 |
Contracted services: |  |  |  |  |  |  |  |  |  |  |  |
Military Privatization |  |  |  |  |  |  |  |  |  |  |  |
Period of fixed price contracts to maintain water systems at various military bases |  |  |  |  |  |  |  |  | 50 years |  |  |
Number of Operating Segments |  |  |  |  |  |  |  |  | 8 |  |  |
American States Utility Services [Member] | Contracted services: |  |  |  |  |  |  |  |  |  |  |  |
Pretax income |  |  |  |  |  |  |  |  |  |  |  |
Increase in pretax operating income |  |  |  |  |  |  |  |  | $ 21,990 | $ 20,414 | 21,320 |
Reportable Legal Entities [Member] | American States Utility Services [Member] | Contracted services: |  |  |  |  |  |  |  |  |  |  |  |
Military Privatization |  |  |  |  |  |  |  |  |  |  |  |
Revenue Recognition, Retrospective Rate-Setting Systems, Amount |  |  |  |  |  |  |  |  |  |  | $ 1,000 |

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