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Utility Plant and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | $ 1,395,959 |  | $ 1,314,283 |  |
Less - accumulated depreciation | (471,665) |  | (442,316) |  |
Construction work in progress | 57,183 |  | 45,824 |  |
Net utility plant | 981,477 |  | 917,791 |  | 896,500
Water |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 1,316,599 |  | 1,236,630 |  |
Water | Land |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 15,423 |  | 15,357 |  |
Water | Intangible assets |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 34,019 |  | 33,750 |  |
Water | Source of water supply |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 75,651 |  | 72,020 |  |
Water | Pumping |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 147,390 |  | 142,586 |  |
Water | Water treatment |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 70,947 |  | 63,738 |  |
Water | Transmission and distribution |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 856,823 |  | 796,973 |  |
Water | General |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 116,346 |  | 112,206 |  |
Electric |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 79,360 |  | 77,653 |  |
Electric | Intangible assets |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 1,200 |  | 1,200 |  |
Electric | Transmission and distribution |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 58,400 |  | 56,757 |  |
Electric | Generation |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 12,547 |  | 12,547 |  |
Electric | General |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 8,413 | [1] | 8,349 | [1] |
GSWC |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 1,386,869 |  | 1,305,366 |  |
Less - accumulated depreciation | (466,329) |  | (437,949) |  |
Construction work in progress | 56,754 |  | 45,720 |  |
Net utility plant | 977,294 |  | 913,137 |  |
GSWC | Water |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 1,307,509 |  | 1,227,713 |  |
Net utility plant | 936,386 |  | 871,756 |  | 852,264
GSWC | Water | Land |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 15,423 |  | 15,357 |  |
GSWC | Water | Intangible assets |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 34,001 |  | 33,731 |  |
GSWC | Water | Source of water supply |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 75,651 |  | 72,020 |  |
GSWC | Water | Pumping |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 147,390 |  | 142,586 |  |
GSWC | Water | Water treatment |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 70,947 |  | 63,738 |  |
GSWC | Water | Transmission and distribution |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 856,823 |  | 796,973 |  |
GSWC | Water | General |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 107,274 |  | 103,308 |  |
GSWC | Electric |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 79,360 |  | 77,653 |  |
Net utility plant | 40,908 |  | 41,381 |  | 39,681
GSWC | Electric | Transmission and distribution |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 58,400 |  | 56,757 |  |
GSWC | Electric | Generation |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | 12,547 |  | 12,547 |  |
GSWC | Electric | General |  |  |  |  |
Utility plant utilized in continuing operations by major asset class |  |  |  |  |
Total | $ 8,413 | [1] | $ 8,349 | [1] |
[1] | Includes intangible assets of $1.2 million for studies performed in association with the electricity segment of the Registrant’s operations for the years ended December 31, 2013 and 2012.

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- Definition Gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 12 -Paragraph 5 -Subparagraph b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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