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Capitalization | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
CAPITALIZATION | Capitalization SJW Group was authorized to issue 36,000,000 shares of common stock of $0.001 par value per share. On April 24, 2019, SJW Group amended its certificate of incorporation to increase the authorized number of shares of common stock to 70,000,000 shares. At December 31, 2019 and 2018, 28,456,508 and 28,404,316, respectively, shares of common stock were issued and outstanding. At December 31, 2019 and 2018, 1,000,000 shares of preferred stock of $0.001 par value per share were authorized for SJW Group. At December 31, 2019 and 2018, no shares of preferred stock were issued or outstanding. On November 28, 2018, SJW Group entered into an underwriting agreement with J.P. Morgan Securities LLC, Barclays Capital Inc., RBC Capital Markets, LLC and UBS Securities LLC, as representatives of the several underwriters (the “Underwriters”), pursuant to which SJW Group sold to the Underwriters an aggregate of 6,750,000 shares of SJW Group’s common stock, par value $0.001 per share (the “Firm Shares”), in an underwritten public offering. Pursuant to the underwriting agreement, SJW Group granted the Underwriters a 30-day option to purchase up to an additional 1,012,500 shares of its common stock (the “Option Shares”), which was exercised in full on December 3, 2018. The offering of the Firm Shares closed on December 3, 2018 and the offering of the Option Shares on December 5, 2018. SJW Group received net proceeds of approximately $358,256 from the sale of the Firm Shares and received additional net proceeds of approximately $53,738 from the sale of the Option Shares, in each case after deducting the underwriting discounts and commissions and estimated offering expenses payable by SJW Group. SJW Group used the net proceeds from the offering, together with the net offering proceeds from the new debt financing in 2019, to finance the merger of CTWS on October 9, 2019 and to pay related fees and expenses. See Note 12 for a discussion on the CTWS merger. Pending such use, the company had invested the net proceeds temporarily in a short-term money market fund.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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