Lines of Credit	12 Months Ended
Dec. 31, 2018
Line of Credit Facility [Abstract]
LINES OF CREDIT	Lines of Credit San Jose Water Company entered into a $125,000 credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as the lender (the “Lender”) on June 1, 2016. The Credit Agreement provides an unsecured credit facility with a letter of credit sublimit of $10,000. Proceeds of borrowings under the Credit Agreement may be used to refinance existing debt, for working capital, and for general corporate purposes. The Credit Agreement has a maturity date of June 1, 2021. The Credit Agreement contains customary representations, warranties and events of default, as well as certain restrictive covenants customary for facilities of this type, including restrictions on indebtedness, liens, acquisitions and investments, restricted payments, asset sales, and fundamental changes. The Credit Agreement also includes certain financial covenants that require the Company to maintain a maximum funded debt to capitalization ratio and a minimum interest coverage ratio. SJW Group and SJW Land Company (collectively, the “Borrowers”), entered into a $15,000 credit agreement with the Lender (the “SJW Group Credit Agreement”) on June 1, 2016, which provides an unsecured credit facility to the Borrowers with a letter of credit sublimit of $5,000. The SJW Group Credit Agreement matures on June 1, 2021. Borrowings under the SJW Group Credit Agreement bear interest under the same terms and conditions as those in the Credit Agreement. In addition, on June 1, 2016, SJW Group, as guarantor, and SJWTX, Inc. (the “Borrower”), entered into a $5,000 credit agreement with the Lender (the “SJWTX Credit Agreement”), which provides an unsecured credit facility to the Borrower with a letter of credit sublimit of $1,000. The SJWTX Credit Agreement matures on June 1, 2021. As of December 31, 2018 and 2017, SJW Group had outstanding balances on the lines of credit of $100,000 and $25,000, respectively. Cost of borrowing on the lines of credit averaged 2.94% and 2.27% as of December 31, 2018 and 2017, respectively. The SJW Group and SJWTX, Inc. unsecured bank lines of credit have the following affirmative covenants calculated with the financial statements of SJW Group, on a consolidated basis: (1) the funded debt cannot exceed 66-2/3% of total capitalization, and (2) net income available for interest charges for the trailing 12-calendar-month period cannot be less than 175% of interest charges. As of December 31, 2018, SJW Group and SJWTX, Inc. were in compliance with all covenants. San Jose Water Company’s unsecured bank lines of credit have the following affirmative covenants: (1) the funded debt cannot exceed 66-2/3% of total capitalization, and (2) net income available for interest charges for the trailing 12-calendar-month period cannot be less than 175% of interest charges. As of December 31, 2018, San Jose Water Company was in compliance with all covenants. SJW Group has received a financing commitment letter from lenders, including JPMorgan Chase Bank, N.A., Barclays Bank PLC, Royal Bank of Canada and UBS AG, Stamford Branch to provide a senior unsecured bridge loan facility of up to $975,000 in the event that SJW Group is unable to secure other financing for the Merger at or prior to the time the Merger is completed. Upon completion of our December 2018 issuance of common stock, the facility commitment was reduced to $563,000. The financing commitments include customary conditions to funding. As of December 31, 2018, the merger was not completed and no amount has been extended under the facility.

Lines of Credit

San Jose Water Company entered into a $125,000 credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as the lender (the “Lender”) on June 1, 2016. The Credit Agreement provides an unsecured credit facility with a letter of credit sublimit of $10,000. Proceeds of borrowings under the Credit Agreement may be used to refinance existing debt, for working capital, and for general corporate purposes. The Credit Agreement has a maturity date of June 1, 2021.

The Credit Agreement contains customary representations, warranties and events of default, as well as certain restrictive covenants customary for facilities of this type, including restrictions on indebtedness, liens, acquisitions and investments, restricted payments, asset sales, and fundamental changes. The Credit Agreement also includes certain financial covenants that require the Company to maintain a maximum funded debt to capitalization ratio and a minimum interest coverage ratio.

SJW Group and SJW Land Company (collectively, the “Borrowers”), entered into a $15,000 credit agreement with the Lender (the “SJW Group Credit Agreement”) on June 1, 2016, which provides an unsecured credit facility to the Borrowers with a letter of credit sublimit of $5,000. The SJW Group Credit Agreement matures on June 1, 2021. Borrowings under the SJW Group Credit Agreement bear interest under the same terms and conditions as those in the Credit Agreement.

In addition, on June 1, 2016, SJW Group, as guarantor, and SJWTX, Inc. (the “Borrower”), entered into a $5,000 credit agreement with the Lender (the “SJWTX Credit Agreement”), which provides an unsecured credit facility to the Borrower with a letter of credit sublimit of $1,000. The SJWTX Credit Agreement matures on June 1, 2021.

As of December 31, 2018 and 2017, SJW Group had outstanding balances on the lines of credit of $100,000 and $25,000, respectively.

Cost of borrowing on the lines of credit averaged 2.94% and 2.27% as of December 31, 2018 and 2017, respectively.

The SJW Group and SJWTX, Inc. unsecured bank lines of credit have the following affirmative covenants calculated with the financial statements of SJW Group, on a consolidated basis: (1) the funded debt cannot exceed 66-2/3% of total capitalization, and (2) net income available for interest charges for the trailing 12-calendar-month period cannot be less than 175% of interest charges. As of December 31, 2018, SJW Group and SJWTX, Inc. were in compliance with all covenants.

San Jose Water Company’s unsecured bank lines of credit have the following affirmative covenants: (1) the funded debt cannot exceed 66-2/3% of total capitalization, and (2) net income available for interest charges for the trailing 12-calendar-month period cannot be less than 175% of interest charges. As of December 31, 2018, San Jose Water Company was in compliance with all covenants.

SJW Group has received a financing commitment letter from lenders, including JPMorgan Chase Bank, N.A., Barclays Bank PLC, Royal Bank of Canada and UBS AG, Stamford Branch to provide a senior unsecured bridge loan facility of up to $975,000 in the event that SJW Group is unable to secure other financing for the Merger at or prior to the time the Merger is completed. Upon completion of our December 2018 issuance of common stock, the facility commitment was reduced to $563,000. The financing commitments include customary conditions to funding. As of December 31, 2018, the merger was not completed and no amount has been extended under the facility.