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Revenue from Contract with Customer | 3 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Revenue from Contract with Customer | Revenues Most of Registrant's revenues are derived from contracts with customers, including tariff-based revenues from its regulated utilities. ASUS's 50-year firm fixed-price contracts with the U.S. government are considered service concession arrangements under ASC 853 Service Concession Arrangements. Accordingly, the services under these contracts are accounted for under Topic 606 Revenue from Contracts with Customers and the water and/or wastewater systems are not recorded as Property, Plant and Equipment on Registrant’s balance sheet. Although GSWC has a diversified base of residential, commercial, industrial and other customers, revenues derived from residential and commercial customers accounted for approximately 90% and 85% of total water and electric revenues, respectively, during each of the three months ended March 31, 2019 and 2018. The vast majority of ASUS's revenues are with the U.S. government. For the three months ended March 31, 2019 and 2018, disaggregated revenues from contracts with customers by segment were as follows:
|  | Three Months Ended March 31,
(dollar in thousands) |  | 2019 |  | 2018
Water: |  |  |  |
Tariff-based revenues |  | $ | 59,575 |  |  | $ | 65,775 |
Surcharges (cost-recovery activities) |  | 291 |  |  | 793 |
Other |  | 459 |  |  | 442 |
Water revenues from contracts with customers |  | 60,325 |  |  | 67,010 |
WRAM under (over)-collection (alternative revenue program) |  | 4,398 |  |  | (2,598 | )
Total water revenues |  | 64,723 |  |  | 64,412 |
Electric: |  |  |  |
Tariff-based revenues |  | 11,266 |  |  | 10,019 |
Surcharges (cost-recovery activities) |  | 54 |  |  | 47 |
Electric revenues from contracts with customers |  | 11,320 |  |  | 10,066 |
BRRAM over-collection (alternative revenue program) |  | (691 | ) |  | (234 | )
Total electric revenues |  | 10,629 |  |  | 9,832 |
Contracted services: |  |  |  |
Water |  | 13,355 |  |  | 13,000 |
Wastewater |  | 13,026 |  |  | 7,484 |
Contracted services revenues from contracts with customers |  | 26,381 |  |  | 20,484 |
Total revenues |  | $ | 101,733 |  |  | $ | 94,728 |
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, were as follows:
(dollar in thousands) |  | March 31, 2019 |  | January 1, 2019
Receivable from the U.S. government |  | $ | 60,011 |  |  | $ | 61,126 |
Contract assets |  | $ | 29,460 |  |  | $ | 24,447 |
Contract liabilities |  | $ | 10,426 |  |  | $ | 7,530 |
Contract Assets - Contract assets are those of ASUS and consist of unbilled revenues recognized from work-in-progress construction projects, where the right to payment is conditional on something other than the passage of time. The classification of this asset as current or noncurrent is based on the timing of when ASUS expects to bill these amounts. Contract Liabilities - Contract liabilities are those of ASUS and consist of billings in excess of revenue recognized. The classification of this liability as current or noncurrent is based on the timing of when ASUS expects to recognize revenue. Revenue for the three months ended March 31, 2019, which was included in contract liabilities at the beginning of the period was not material. Contracted services revenues recognized during the three months ended March 31, 2019 from performance obligations satisfied in previous periods were not material. As of March 31, 2019, Registrant's aggregate remaining performance obligations, which are entirely for the contracted services segment, were $3.2 billion. Registrant expects to recognize revenue on these remaining performance obligations over the remaining term of each of the 50-year contracts, which range from 36 to 49 years. Each of the contracts with the U.S. government is subject to termination, in whole or in part, prior to the end of its 50-year term for convenience of the U.S. government.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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