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Business Segments: (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 USD ($) segment | Mar. 31, 2017 USD ($) | Sep. 30, 2017 | Dec. 31, 2017 USD ($)
Details of reportable segment |  |  |  |
Total operating revenues | $ 94,728 | $ 98,810 |  |
Operating income (loss) | 18,691 | 24,576 |  |
Interest expense, net | 5,387 | 5,646 |  |
Utility plant | 1,218,830 | 1,137,159 |  | $ 1,204,992
Depreciation and amortization expense | 9,666 | 9,683 |  |
Income tax expense (benefit) | 2,564 | 6,855 |  |
Capital additions | $ 30,364 | 23,994 |  |
AWR |  |  |  |
Details of reportable segment |  |  |  |
Number of reportable segments | segment | 3 |  |  |
GOLDEN STATE WATER COMPANY |  |  |  |
Details of reportable segment |  |  |  |
Public Utilities Property Plant and Equipment Depreciation on Transportation Equipment | $ 60 | 61 |  |
Number of reportable segments | segment | 2 |  |  |
Total operating revenues | $ 74,244 | 76,906 |  |
Operating income (loss) | 16,297 | 21,876 |  |
Utility plant | 1,209,299 |  |  | $ 1,197,940
Depreciation and amortization expense | 9,334 | 9,438 |  |
Income tax expense (benefit) | $ 2,115 | 6,273 |  |
Fort Riley [Member] |  |  |  |
Details of reportable segment |  |  |  |
Period of fixed price contracts to operate and maintain water systems at various military bases |  |  | 50 years |
ASUS | Contracted Services |  |  |  |
Details of reportable segment |  |  |  |
Period of fixed price contracts to operate and maintain water systems at various military bases | 50 years |  |  |
Reportable Legal Entities | GOLDEN STATE WATER COMPANY | Water Service Utility Operations |  |  |  |
Details of reportable segment |  |  |  |
Total operating revenues | $ 64,412 | 66,404 |  |
Operating income (loss) | 14,058 | 19,097 |  |
Interest expense, net | 5,009 | 5,145 |  |
Utility plant | 1,149,038 | 1,075,513 |  |
Depreciation and amortization expense | 8,769 | 8,901 |  |
Income tax expense (benefit) | 1,649 | 5,485 |  |
Capital additions | 26,618 | 22,984 |  |
Reportable Legal Entities | GOLDEN STATE WATER COMPANY | Electric Service Utility Operations |  |  |  |
Details of reportable segment |  |  |  |
Total operating revenues | 9,832 | 10,502 |  |
Operating income (loss) | 2,239 | 2,779 |  |
Interest expense, net | 370 | 375 |  |
Utility plant | 60,261 | 56,015 |  |
Depreciation and amortization expense | 565 | 537 |  |
Income tax expense (benefit) | 466 | 788 |  |
Capital additions | 974 | 723 |  |
Reportable Legal Entities | ASUS | Contracted Services |  |  |  |
Details of reportable segment |  |  |  |
Total operating revenues | 20,484 | 21,904 |  |
Operating income (loss) | 2,397 | 2,704 |  |
Interest expense, net | (66) | (74) |  |
Utility plant | 9,531 | 5,631 |  |
Depreciation and amortization expense | 332 | 245 |  |
Income tax expense (benefit) | 554 | 861 |  |
Capital additions | 2,772 | 287 |  |
Intersegment Eliminations | AWR |  |  |  |
Details of reportable segment |  |  |  |
Total operating revenues | 0 | 0 |  |
Operating income (loss) | (3) | (4) |  |
Interest expense, net | 74 | (52) |  |
Utility plant | 0 | 0 |  |
Depreciation and amortization expense | 0 | 0 |  |
Income tax expense (benefit) | (105) | (279) |  |
Capital additions | $ 0 | $ 0 |  |
Minimum | Fort Riley [Member] |  |  |  |
Details of reportable segment |  |  |  |
Period of Transition to Operate and Maintain Water Systems at New Military Base | 6 months |  |  |
Maximum | Fort Riley [Member] |  |  |  |
Details of reportable segment |  |  |  |
Period of Transition to Operate and Maintain Water Systems at New Military Base | 12 months |  |  |

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