SJW Group and CTWS Merger Agreement	9 Months Ended
Sep. 30, 2018
Business Combinations [Abstract]
SJW GROUP AND CTWS MERGER AGREEMENT	SJW Group and CTWS Merger Agreement On March 14, 2018, SJW Group, Hydro Sub, Inc., a Connecticut corporation and a wholly-owned subsidiary of SJW Group and CTWS entered into an Agreement and Plan of Merger to merge the two companies in an all-stock transaction. On August 5, 2018, SJW Group, Hydro Sub, Inc. and CTWS entered into a Second Amended and Restated Agreement & Plan of Merger (the “Merger Agreement”), which among other things, changed the merger to an all-cash transaction. Under the terms of the Merger Agreement, Hydro Sub, Inc. will merge with and into CTWS (the “Merger”), with CTWS surviving the Merger as a wholly-owned subsidiary of SJW Group. Subject to the terms and conditions of the Merger Agreement, at the time at which the Merger becomes effective (the “Effective Time”), each share of common stock, without par value, of CTWS (“CTWS Common Share”), other than CTWS Common Shares directly or indirectly owned by SJW Group, Hydro Sub, Inc., CTWS or any of their respective subsidiaries (in each case, other than any CTWS Common Shares held on behalf of third parties), issued and outstanding immediately prior to the Effective Time will be converted into the right to receive $70.00 per share in cash (without interest and less any applicable withholding taxes). The transaction, which is expected to close during the first quarter of 2019, was approved by the boards of directors of both companies. Consummation of the Merger is subject to customary conditions, including, without limitation: approval by CTWS shareholders; approval by certain regulators; the absence of any law or judgment prohibiting the consummation of the Merger; the accuracy of the representations and warranties of the parties (subject to customary materiality qualifiers); each party’s performance in all material respects of its obligations contained in the Merger Agreement; and the absence of any material adverse effect on SJW Group or CTWS since the date of the Merger Agreement, which has not been ameliorated or cured. There is no guarantee that all of the closing conditions and approvals will be satisfied, and the failure to complete the proposed merger may adversely affect the financial conditions and results of operations of SJW Group. CTWS previously received an unsolicited proposal from Eversource Energy. The CTWS board of directors has determined that the proposal was neither a superior proposal nor reasonably likely to lead to superior proposal. On April, 27, 2018, Eversource Energy filed a preliminary proxy statement to solicit proxies in opposition to the proposed merger. Eversource Energy has not revised its preliminary proxy statement in connection with the revised all-cash Merger, and it is unclear what additional actions Eversource Energy may take to further its proposal. In addition, on August 17, 2018, California Water Service Group, which had previously launched an unsolicited tender offer to acquire all outstanding shares of SJW Group, announced that it had abandoned such offer.

SJW Group and CTWS Merger Agreement

On March 14, 2018, SJW Group, Hydro Sub, Inc., a Connecticut corporation and a wholly-owned subsidiary of SJW Group and CTWS entered into an Agreement and Plan of Merger to merge the two companies in an all-stock transaction. On August 5, 2018, SJW Group, Hydro Sub, Inc. and CTWS entered into a Second Amended and Restated Agreement & Plan of Merger (the “Merger Agreement”), which among other things, changed the merger to an all-cash transaction. Under the terms of the Merger Agreement, Hydro Sub, Inc. will merge with and into CTWS (the “Merger”), with CTWS surviving the Merger as a wholly-owned subsidiary of SJW Group. Subject to the terms and conditions of the Merger Agreement, at the time at which the Merger becomes effective (the “Effective Time”), each share of common stock, without par value, of CTWS (“CTWS Common Share”), other than CTWS Common Shares directly or indirectly owned by SJW Group, Hydro Sub, Inc., CTWS or any of their respective subsidiaries (in each case, other than any CTWS Common Shares held on behalf of third parties), issued and outstanding immediately prior to the Effective Time will be converted into the right to receive $70.00 per share in cash (without interest and less any applicable withholding taxes).

The transaction, which is expected to close during the first quarter of 2019, was approved by the boards of directors of both companies. Consummation of the Merger is subject to customary conditions, including, without limitation: approval by CTWS shareholders; approval by certain regulators; the absence of any law or judgment prohibiting the consummation of the Merger; the accuracy of the representations and warranties of the parties (subject to customary materiality qualifiers); each party’s performance in all material respects of its obligations contained in the Merger Agreement; and the absence of any material adverse effect on SJW Group or CTWS since the date of the Merger Agreement, which has not been ameliorated or cured. There is no guarantee that all of the closing conditions and approvals will be satisfied, and the failure to complete the proposed merger may adversely affect the financial conditions and results of operations of SJW Group.

CTWS previously received an unsolicited proposal from Eversource Energy. The CTWS board of directors has determined that the proposal was neither a superior proposal nor reasonably likely to lead to superior proposal. On April, 27, 2018, Eversource Energy filed a preliminary proxy statement to solicit proxies in opposition to the proposed merger. Eversource Energy has not revised its preliminary proxy statement in connection with the revised all-cash Merger, and it is unclear what additional actions Eversource Energy may take to further its proposal. In addition, on August 17, 2018, California Water Service Group, which had previously launched an unsolicited tender offer to acquire all outstanding shares of SJW Group, announced that it had abandoned such offer.