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Revenue from Contract with Customer (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | For the three and six months ended June 30, 2018, disaggregated revenues from contracts with customers by segment are as follows:
(dollar in thousands) |  | Three Months Ended June 30, 2018 |  | Six Months Ended June 30, 2018
Water: |  |  |  |
Tariff-based revenues |  | $ | 70,251 |  |  | $ | 136,026 |
CPUC-approved surcharges (cost-recovery activities) |  | 728 |  |  | 1,521 |
Other |  | 453 |  |  | 895 |
Water revenues from contracts with customers |  | 71,432 |  |  | 138,442 |
WRAM under-collection (alternative revenue program) |  | 5,301 |  |  | 2,703 |
Total water revenues |  | 76,733 |  |  | 141,145 |
Electric: |  |  |  |
Tariff-based revenues |  | 7,795 |  |  | 17,814 |
CPUC-approved surcharges (cost-recovery activities) |  | 63 |  |  | 110 |
Electric revenues from contracts with customers |  | 7,858 |  |  | 17,924 |
BRRAM over-collection (alternative revenue program) |  | (17 | ) |  | (251 | )
Total electric revenues |  | 7,841 |  |  | 17,673 |
Contracted services: |  |  |  |
Water |  | 14,233 |  |  | 27,233 |
Wastewater |  | 8,094 |  |  | 15,578 |
Contracted services revenues from contracts with customers |  | 22,327 |  |  | 42,811 |
Total revenues |  | $ | 106,901 |  |  | $ | 201,629 |
Schedule of Contract Assets and Contract LiabilitiesRevenue from Contract with Customer [Text Block] | The opening and closing balances of the receivable from the U.S. government, contract assets and contract liabilities from contracts with customers, which related entirely to ASUS, are as follows:
(dollar in thousands) |  | June 30, 2018 |  | January 1, 2018
Receivable from the U.S. government |  | $ | 56,261 |  |  | $ | 40,150 |
Contract assets |  | $ | 16,153 |  |  | $ | 30,388 |
Contract liabilities |  | $ | 7,043 |  |  | $ | 3,911 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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