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Financial Statement Schedule - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jun. 29, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Operating revenue |  | $ 573,686 | $ 564,526 | $ 420,482
Operating expense: |  |  |  |
Administrative and general |  | 87,332 | 79,741 | 66,301
Property taxes and other non-income taxes |  | 30,964 | 29,886 | 19,068
Merger related expenses |  | 0 | 0 | 15,768
Total operating expense |  | 462,527 | 446,856 | 363,003
Operating income |  | 111,159 | 117,670 | 57,479
Other (expense) income: |  |  |  |
Interest on long-term debt, mortgage and other interest expense |  | (54,339) | (54,255) | (31,796)
Gain on sale of Texas Water Alliance (“TWA”) | $ 3,000 | 3,000 | 0 | 0
Interest income on money market fund |  | 0 | 0 | 6,536
Other, net |  | 6,770 | 5,906 | 2,091
Income before income taxes |  | 68,847 | 69,895 | 32,081
Provision for income taxes |  | 8,369 | 8,380 | 8,454
SJW Group net income |  | 60,478 | 61,515 | 23,403
Other comprehensive income (loss), net |  | 901 | (1,190) | 126
SJW Group comprehensive income |  | 61,379 | 60,325 | 23,529
SJW Group |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Operating revenue |  | 0 | 0 | 0
Operating expense: |  |  |  |
Administrative and general |  | 2,050 | 3,110 | 8,130
Property taxes and other non-income taxes |  | (38) | 250 | 250
Merger related expenses |  | 0 | 0 | 14,849
Total operating expense |  | 2,012 | 3,360 | 23,229
Operating income |  | (2,012) | (3,360) | (23,229)
Other (expense) income: |  |  |  |
Interest on long-term debt, mortgage and other interest expense |  | (18,673) | (19,430) | (6,615)
Gain on sale of Texas Water Alliance (“TWA”) |  | 3,000 | 0 | 0
Interest income on money market fund |  | 0 | 0 | 6,536
Other, net |  | (160) | (250) | 89
Income before income taxes |  | (17,845) | (23,040) | (23,219)
Provision for income taxes |  | (4,660) | (6,414) | (1,431)
Equity earnings from subsidiaries, net of taxes |  | 73,663 | 78,141 | 45,191
Subsidiaries |  |  |  |
Other (expense) income: |  |  |  |
Equity earnings from subsidiaries, net of taxes |  | $ 73,663 | $ 78,141 | $ 45,191

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2443-110228 + Details
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