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Military Privatization (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Military Privatization |  |  |  |
Billings in excess of costs and estimated earnings on contracts | $ 3,764 | $ 11,736 |  |
Receivables from the U.S. government: |  |  |  |
Less: allowance for doubtful accounts | (944) | (892) | $ (1,187) | $ (1,228)
Pretax income |  |  |  |
Increase in pretax operating income | $ 118,489 | 119,045 | 119,072 |
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 | $ 111,397 | 94,654 |  |
Less: Billings to date | (61,662) | (56,114) |  |
Total | 49,735 | 38,540 |  |
Amount included in accompanying balance sheets |  |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | 53,499 | 50,276 |  |
Billings in excess of costs and estimated earnings on uncompleted contracts | (3,764) | (11,736) |  |
Total | 49,735 | 38,540 |  |
Receivables from the U.S. government: |  |  |  |
Billed receivables from the U.S. government | 5,861 | 6,709 |  |
Unbilled Contract Receivables, Current | 1,309 | 3,689 |  |
Less: allowance for doubtful accounts | 0 | 0 |  |
Pretax income |  |  |  |
Government Contract Receivable | 7,170 | 10,398 |  |
American States Utility Services [Member] | Military Utility Privatization Subsidiaries |  |  |  |
Pretax income |  |  |  |
Increase in pretax operating income | 18,091 | 19,351 | $ 16,737 |
Reportable Legal Entities [Member] | American States Utility Services [Member] | Military Utility Privatization Subsidiaries |  |  |  |
Military Privatization |  |  |  |
Revenue Recognition, Retrospective Rate-Setting Systems, Amount | $ 3,000 | $ 1,700 |  |

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