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Lines of Credit - Narrative (Details) | Dec. 31, 2023 USD ($) | Aug. 02, 2023 | Feb. 06, 2023 USD ($) | Dec. 31, 2022 | Oct. 31, 2022 USD ($) | Aug. 02, 2022 USD ($)
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Line of Credit Facility [Line Items] |  |  |  |  |  |
Short-term debt, weighted average interest rate | 6.48% |  |  | 5.40% |  |
Revolving Credit Facility | Line of Credit |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 350,000,000 |  |  |  |  |
Revolving Credit Facility | Line of Credit | Credit Agreement |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | $ 300,000,000
Capitalization ratio |  | 0.70 |  |  |  |
Revolving Credit Facility | Line of Credit | CTWS Credit Agreement Maturing August 2028 |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | 10,000,000 |  |  |  | $ 10,000 |
Revolving Credit Facility | Line of Credit | CTWS Credit Agreement Maturing May 2025 |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 40,000,000 |  | $ 40,000,000 |  |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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