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Lines of Credit Narrative (Details) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) | Mar. 01, 2020 USD ($) | Dec. 31, 2018 USD ($) | Jun. 01, 2016 USD ($)
Document Period End Date | Dec. 31, 2019 |  |  |
Revolving Credit Facility [Member] | SJW Group [Member] |  |  |  |
Aggregate outstanding balance on lines of credit | $ 117,209 |  | $ 100,000 |
Unsecured Debt [Member] | Chase Bank, N.A. [Member] | SJW Group [Member] |  |  |  |
Debt covenant interest charge maximum to net Income available to stockholders | 1.75 |  |  |
Ratio of indebtedness to total capital | 0.666 |  |  |
Line of Credit [Member] | Revolving Credit Facility [Member] | SJW Group [Member] |  |  |  |
Line of Credit Facility, Interest Rate at Period End | 3.73% |  | 2.94% |
Line of Credit [Member] | Revolving Credit Facility [Member] | Chase Bank, N.A. [Member] | SJW Corp. and SJW Land Company [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  |  |  | $ 15,000
Line of Credit [Member] | Revolving Credit Facility [Member] | CoBank [Member] | Connecticut Water Service, Inc. [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity | $ 15,000 |  |  |
Line of Credit [Member] | Revolving Credit Facility [Member] | RBS Citizens, N.A. [Member] | Connecticut Water Service, Inc. [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity | $ 95,000 |  |  |
Line of Credit [Member] | Credit Agreement [Member] | Chase Bank, N.A. [Member] | San Jose Water Company [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  |  |  | 125,000
Line of Credit [Member] | Credit Agreement [Member] | Standby Letters of Credit [Member] | Chase Bank, N.A. [Member] | San Jose Water Company [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  |  |  | 10,000
Line of Credit [Member] | SJW Corp Credit Agreement [Member] | Standby Letters of Credit [Member] | Chase Bank, N.A. [Member] | SJW Corp. and SJW Land Company [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  |  |  | 5,000
Line of Credit [Member] | SJWTX Credit Agreement [Member] | Revolving Credit Facility [Member] | Chase Bank, N.A. [Member] | SJW Corp. and SJWTX, Inc. [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  |  |  | 5,000
Line of Credit [Member] | SJWTX Credit Agreement [Member] | Standby Letters of Credit [Member] | Chase Bank, N.A. [Member] | SJW Corp. and SJWTX, Inc. [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  |  |  | $ 1,000
Subsequent Event [Member] | Line of Credit [Member] | Revolving Credit Facility [Member] | RBS Citizens, N.A. [Member] | Connecticut Water Service, Inc. [Member] |  |  |  |
LIne of credit facility, maximum borrowing capacity |  | $ 75,000 |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a 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. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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