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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
Property, Plant and Equipment | The major components of depreciable plant and equipment as of December 31, 2014 and 2013 are as follows:
| 2014 |  | 2013
Equipment | $ | 242,383 |  |  | 226,557 |
Transmission and distribution | 1,042,794 |  |  | 967,031 |
Office buildings and other structures | 68,595 |  |  | 60,998 |
Total depreciable plant and equipment | $ | 1,353,772 |  |  | 1,254,586 |
Depreciation is computed using the straight-line method over the estimated service lives of the assets, ranging from 5 to 75 years. The estimated service lives of depreciable plant and equipment are as follows:
| Useful Lives
Equipment | 5 to 35 years
Transmission and distribution plant | 35 to 75 years
Office buildings and other structures | 7 to 50 years
Schedule of Real Estate Investments | The major components of real estate investments as of December 31, 2014 and 2013 are as follows:
| 2014 |  | 2013
Land | $ | 17,297 |  |  | 18,892 |
Buildings and improvements | 56,168 |  |  | 59,256 |
Intangibles | 329 |  |  | 329 |
Total real estate investment | $ | 73,794 |  |  | 78,477 |
Schedule of Future Minimum Rental Payments for Operating Leases | The following schedule shows the future minimum rental payments to be received from third parties under operating leases that have remaining noncancelable lease terms in excess of one year as of December 31, 2014:
Year ending December 31: | Rental Revenue
2015 | $ | 5,345 |
2016 | 5,514 |
2017 | 5,612 |
2018 | 4,789 |
2019 | 3,753 |
Thereafter | 13,691 |
Schedule of Regulatory Assets and Liabilities | Regulatory assets and liabilities are comprised of the following as of December 31:
| 2014 |  | 2013
Regulatory assets, net: |  |  |
Income tax temporary differences, net | $ | 6,731 |  |  | 8,220 |
Postretirement pensions and other medical benefits | 115,494 |  |  | 62,949 |
Balancing and memorandum accounts, net | 47,061 |  |  | 7,689 |
Other, net | 5,577 |  |  | 4,685 |
Total regulatory assets, net in Consolidated Balance Sheets | $ | 174,863 |  |  | 83,543 |
Less: current regulatory asset, net | 16,853 |  |  | — |
Total regulatory assets, net, less current portion | $ | 158,010 |  |  | 83,543 |
Schedule of Estimated Refunds of Advances for Construction and Contributions in Aid of Construction | Estimated refunds for the next five years and thereafter are shown below:
| Estimated Refunds
2015 | $ | 2,508 |
2016 | 2,508 |
2017 | 2,508 |
2018 | 2,508 |
2019 | 2,508 |
Thereafter | 60,763 |
Schedule of Asset Retirement Obligations | For the years ended December 31, 2014 and 2013, the asset retirement obligation is as follows:
| 2014 |  | 2013
Retirement obligation | $ | 4,355 |  |  | 4,612 |
Discount rate | 6 | % |  | 6 | %
Present value, recorded as a liability | 1,994 |  |  | 1,733 |
Deferred tax | 1,371 |  |  | 1,192 |
Regulatory asset | $ | 3,365 |  |  | 2,925 |
Schedule of Balancing and Memorandum Accounts | San Jose Water Company met the recognition requirements for certain of its balancing and memorandum accounts and certain amounts subject to balancing and memorandum accounts and recorded revenue and regulatory assets as follows:
| For the year ended December 31, 2014
Beginning Balance |  | Revenue Increase (Reduction) |  | Refunds (Collections) |  | Ending Balance
Memorandum accounts | $ | (1,896 | ) |  | 341 |  |  | 178 |  |  | (1,377 | )
Balancing accounts: |  |  |  |  |  |  |
Water supply costs | (2,378 | ) |  | 3,353 |  |  | (85 | ) |  | 890 |
Pension | 9,734 |  |  | (7,705 | ) |  | (617 | ) |  | 1,412 |
2012 General Rate Case true-up | — |  |  | 46,456 |  |  | (2,056 | ) |  | 44,400 |
All others | 2,229 |  |  | (447 | ) |  | (46 | ) |  | 1,736 |
Total balancing accounts | $ | 9,585 |  |  | 41,657 |  |  | (2,804 | ) |  | 48,438 |
Total | $ | 7,689 |  |  | 41,998 |  |  | (2,626 | ) |  | 47,061 |
| For the year ended December 31, 2013
Beginning Balance |  | Revenue Increase (Reduction) |  | Refunds (Collections) |  | Ending Balance
Memorandum accounts | $ | (1,887 | ) |  | 869 |  |  | (878 | ) |  | (1,896 | )
Balancing accounts: |  |  |  |  |  |  |
Water supply costs | (1,590 | ) |  | (788 | ) |  | — |  |  | (2,378 | )
Pension | 6,657 |  |  | 3,077 |  |  | — |  |  | 9,734 |
2012 General Rate Case true-up | — |  |  | — |  |  | — |  |  | — |
All others | 369 |  |  | 1,860 |  |  | — |  |  | 2,229 |
Total balancing accounts | $ | 5,436 |  |  | 4,149 |  |  | — |  |  | 9,585 |
Total | $ | 3,549 |  |  | 5,018 |  |  | (878 | ) |  | 7,689 |
| For the year ended December 31, 2012
Beginning Balance |  | Revenue Increase (Reduction) |  | Refunds (Collections) |  | Ending Balance
Memorandum accounts | $ | 5,739 |  |  | (2,832 | ) |  | (4,794 | ) |  | (1,887 | )
Balancing accounts: |  |  |  |  |  |  |
Water supply costs | — |  |  | (1,590 | ) |  | — |  |  | (1,590 | )
Pension | — |  |  | 6,657 |  |  | — |  |  | 6,657 |
2012 General Rate Case true-up | — |  |  | — |  |  | — |  |  | — |
All others | — |  |  | 369 |  |  | — |  |  | 369 |
Total balancing accounts | $ | — |  |  | 5,436 |  |  | — |  |  | 5,436 |
Total | $ | 5,739 |  |  | 2,604 |  |  | (4,794 | ) |  | 3,549 |

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