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Military Privatization (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Military Privatization |  |  |
Billings in excess of costs and estimated earnings on contracts | $ 2,263 | $ 3,764 |
Receivables from the U.S. government: |  |  |
Less: allowance for doubtful accounts | (764) | (944) | $ (892)
Pretax income |  |  |
Increase in pretax operating income | $ 114,716 | 118,489 | 119,045
Military Utility Privatization Subsidiaries |  |  |
Military Privatization |  |  |
Period of fixed price contracts to maintain water systems at various military bases | 50 years |  |
Initial contract period | 2 years |  |
Price redetermination interval | 3 years |  |
Revenues recognized net of billings to date |  |  |
Revenues (costs and estimated earnings) recognized on uncompleted contracts | $ 104,830 | 111,397 |
Less: Billings to date | (43,161) | (61,662) |
Total | 61,669 | 49,735 |
Amount included in accompanying balance sheets |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | 63,932 | 53,499 |
Billings in excess of costs and estimated earnings on uncompleted contracts | (2,263) | (3,764) |
Total | 61,669 | 49,735 |
Receivables from the U.S. government: |  |  |
Billed receivables from the U.S. government | 8,467 | 5,861 |
Unbilled Contract Receivables, Current | 6,691 | 1,309 |
Pretax income |  |  |
Government Contract Receivable | 15,158 | 7,170 |
American States Utility Services [Member] | Military Utility Privatization Subsidiaries |  |  |
Pretax income |  |  |
Increase in pretax operating income | 18,916 | 18,091 | $ 19,351
Reportable Legal Entities [Member] | American States Utility Services [Member] | Military Utility Privatization Subsidiaries |  |  |
Military Privatization |  |  |
Revenue Recognition, Retrospective Rate-Setting Systems, Amount | $ 421 | $ 3,000 |

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