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Lines of Credit (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Schedule of Line of Credit Facilities | SJW Group and its subsidiaries have unsecured line of credit agreements where borrowings are used to refinance existing debt, for working capital, and for general corporate purposes. A summary of the line of agreements as of December 31, 2021 and 2020 are as follows:
|  |  | 2021 |  | 2020
| Maturity Date |  | Line Limit |  | Amounts Outstanding |  | Unused Portion |  | Amounts Outstanding
SJWC credit agreement (a) | December 31, 2023 |  | $ | 140,000 |  |  | — |  |  | 140,000 |  |  | 80,000 |
CTWS credit agreement | December 14, 2023 |  | 75,000 |  |  | 22,996 |  |  | 52,004 |  |  | 55,094 |
CTWS credit agreement | May 15, 2025 |  | 40,000 |  |  | 40,000 |  |  | — |  |  | 40,000 |
SJWTX, Inc. credit agreement (b) | December 31, 2023 |  | 5,000 |  |  | — |  |  | 5,000 |  |  | — |
|  |  | $ | 260,000 |  |  | 62,996 |  |  | 197,004 |  |  | 175,094 |
___________________________________ (a)Credit agreement also provides for a letter of credit sublimit of $15,000. (b)Credit agreement also provides for a letter of credit sublimit of $1,000.

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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