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Regulatory Rate Filings (Details) | Feb. 29, 2016 USD ($) | Feb. 05, 2016 USD ($) $ / Ccf | Dec. 15, 2015 USD ($) $ / Ccf | Apr. 23, 2015 USD ($) | Jan. 05, 2015 USD ($)
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Regulatory Liabilities [Line Items] |  |  |  |  |
Regulatory Rate Filings, Requested Rate Increase, Year One |  |  |  |  | $ 34,928,000
Regulatory Rate Filings, Requested Rate Increase as Percentage of Total Revenue at Time of Request, Year One |  |  |  |  | 12.22%
Regulatory Rate Filings, Requested Rate Increase, Year Two |  |  |  |  | $ 9,954,000
Regulatory Rate Filings, Proposed Rate Increase, Percent of Authorized Revenue, Year Two |  |  |  |  | 3.11%
Regulatory Rate Filings, Requested Rate Increase, Year Three |  |  |  |  | $ 17,567,000
Regulatory Rate Filings, Requested Rate Increase, Percent of Authorized Revenue, Year Three |  |  |  |  | 5.36%
Balancing Account, Recovery Request |  |  | $ 2,599,000 |  | $ 4,752,000
Memorandum Account, Authorized Recovery |  | $ 7,668,000 |  |  |
Balancing Account, Uncollected |  |  | $ 590,000 |  |
Regulatory Rate Filings, Recommended Rate Increase, Year One |  |  |  | $ 23,468,000 |
Regulatory Rate Filings, Recommended Rate Increase as Percentage of Total Revenue at Time of Request, Year One |  |  |  | 8.54% |
Regulatory Rate Filings, Recommended Rate Increase, Year Two |  |  |  | $ 13,803,000 |
Regulatory Rate Filings, Recommended Rate Increase as Percentage of Total Revenue at Time of Request, Year Two |  |  |  | 4.42% |
Regulatory Rate Filings, Recommended Rate Increase, Year Three |  |  |  | $ 16,261,000 |
Regulatory Rate Filings, Recommended Rate Increase as Percentage of Total Revenue at Time of Request, Year Three |  |  |  | 4.95% |
Requested Regulatory Surcharge, Per CCF | $ / Ccf |  | 0.1441 | 0.0492 |  |
Regulatory Rate Filings, Requested Rate Increase, Authorized Revenue | $ 1,659,000 |  |  |  |
Regulatory Rate Filings, Increase Requested, Percent of Authorized Revenue | 0.55% |  |  |  |
Authorized Regulatory Surcharge, Per 15 CCF | $ 0.46 |  |  |  |

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- Definition Authorized Regulatory Surcharge, Per 15 CCF + References No definition available. + Details
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- Definition A request to the regulatory authority for authorization to recover under (over) -collected amounts. + References No definition available. + Details
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Namespace Prefix: | sjw_
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Balance Type: | debit
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- Definition Balancing Account, Uncollected + References No definition available. + Details
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- Definition Memorandum accounts, Authorized Recovery + References No definition available. + Details
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- Definition Regulatory Rate Filings, Recommended Rate Increase, Year One + References No definition available. + Details
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- Definition Regulatory Rate Filings, Recommended Rate Increase, Year Three + References No definition available. + Details
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- Definition Regulatory Rate Filings, Recommended Rate Increase, Year Two + References No definition available. + Details
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- Definition Regulatory Rate Filings, Recommended Rate Increase as Percentage of Total Revenue at Time of Request, Year Two + References No definition available. + Details
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- Definition Regulatory Rate Filings, Requested Rate Increase as Percentage of Total Revenue at Time of Request, Year One + References No definition available. + Details
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- Definition Requested Regulatory Surcharge, Per CCF + References No definition available. + Details
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