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Business Segments: (Tables) | 3 Months Ended
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Mar. 31, 2016
Segment Reporting [Abstract] |
Schedule of reporting segments information | The tables below set forth information relating to GSWC’s operating segments, ASUS and its subsidiaries and other matters. Total assets by segment are not presented below, as certain of Registrant’s assets are not tracked by segment. The utility plant amounts are net of respective accumulated provisions for depreciation. Capital additions reflect capital expenditures paid in cash and exclude U.S. government-funded and third-party prime contractor funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC.
|  | As Of And For The Three Months Ended March 31, 2016
|  | GSWC |  |  |  | AWR |  | Consolidated
(dollars in thousands) |  | Water |  | Electric |  | ASUS |  | Parent |  | AWR
Operating revenues |  | $ | 66,312 |  |  | $ | 10,573 |  |  | $ | 16,642 |  |  | $ | — |  |  | $ | 93,527 |
Operating income (loss) |  | 17,408 |  |  | 2,235 |  |  | 1,592 |  |  | (2 | ) |  | 21,233 |
Interest expense, net |  | 5,075 |  |  | 325 |  |  | 7 |  |  | 44 |  |  | 5,451 |
Utility plant |  | 1,022,525 |  |  | 51,873 |  |  | 4,920 |  |  | — |  |  | 1,079,318 |
Depreciation and amortization expense (1) |  | 9,023 |  |  | 507 |  |  | 261 |  |  | — |  |  | 9,791 |
Income tax expense (benefit) |  | 4,586 |  |  | 854 |  |  | 573 |  |  | (200 | ) |  | 5,813 |
Capital additions |  | 28,141 |  |  | 820 |  |  | 493 |  |  | — |  |  | 29,454 |
|  | As Of And For The Three Months Ended March 31, 2015
|  | GSWC |  |  |  | AWR |  | Consolidated
(dollars in thousands) |  | Water |  | Electric |  | ASUS |  | Parent |  | AWR
Operating revenues |  | $ | 71,504 |  |  | $ | 10,969 |  |  | $ | 18,460 |  |  | $ | — |  |  | $ | 100,933 |
Operating income (loss) |  | 19,741 |  |  | 2,732 |  |  | 2,420 |  |  | (3 | ) |  | 24,890 |
Interest expense, net |  | 4,801 |  |  | 313 |  |  | 8 |  |  | (6 | ) |  | 5,116 |
Utility plant |  | 958,270 |  |  | 44,871 |  |  | 4,422 |  |  | — |  |  | 1,007,563 |
Depreciation and amortization expense (1) |  | 9,941 |  |  | 300 |  |  | 307 |  |  | — |  |  | 10,548 |
Income tax expense (benefit) |  | 6,144 |  |  | 1,103 |  |  | 871 |  |  | (220 | ) |  | 7,898 |
Capital additions |  | 16,244 |  |  | 1,074 |  |  | 72 |  |  | — |  |  | 17,390 |
(1) Depreciation computed on GSWC’s transportation equipment is recorded in other operating expenses and totaled $175,000 and $223,000 for the three months ended March 31, 2016 and 2015, respectively.
Schedule of reconciliation of total utility plant (a key figure for rate-making) to total consolidated assets | The following table reconciles total utility plant (a key figure for rate-making) to total consolidated assets (in thousands):
|  | March 31,
|  | 2016 |  | 2015
Total utility plant |  | $ | 1,079,318 |  |  | $ | 1,007,563 |
Other assets |  | 289,573 |  |  | 354,939 |
Total consolidated assets (2) |  | $ | 1,368,891 |  |  | $ | 1,362,502 |
(2) Total consolidated assets shown as of March 31, 2015 exclude $4.9 million of debt issuance costs, (except for credit facility costs), which were previously reported as "Other assets" prior to adoption of Accounting Standard Update 2015-03, Simplifying the Presentation of Debt Issuance Costs as disclosed in Note 1. Credit facility costs continue to be reported as "Other assets."

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- Definition Tabular disclosure of reconciliation of total utility plant (a key figure for rate-making) to total consolidated assets. + References No definition available. + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8736-108599 + Details
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