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California Water Service Group Stock California Water Service Group Stock | 9 Months Ended
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Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract] |
California Water Service Group Stock | California Water Service Group Stock For the three and nine months ended September 30, 2018, SJW Group sold 82,340 and 100,000 shares, respectively, of California Water Service Group for $3,398 and $4,112, respectively, before fees of $7 and $9, respectively. SJW Group recognized a gain on the sale of the stock of approximately $191 and $104, respectively, and a tax expense of approximately $53 and $29, respectively, for a net gain of $138 and $75 for the three and nine months ended September 30, 2018, respectively. As of September 30, 2018, SJW Group held no remaining shares of California Water Service Group. The company classified its investment in California Water Service Group as available for sale. The stock was carried at the quoted market price with the changes in gain or loss reported as a component of other expense (income) on the Consolidated Statements of Comprehensive Income.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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