2.4.0.8 HtmlAndXml 167 221 1 false 57 0 false 5 false false R1.htm 0001000 - Document - Document and Entity Information Sheet http://www.ctwater.com/role/DocumentAndEntityInformation Document and Entity Information R1.xml true false R2.htm 1001000 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.ctwater.com/role/ConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS R2.xml false false R3.htm 1001501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.ctwater.com/role/ConsolidatedBalanceSheetsParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) R3.xml false false R4.htm 1003000 - Statement - CONSOLIDATED STATEMENTS OF INCOME Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfIncome CONSOLIDATED STATEMENTS OF INCOME R4.xml false false R5.htm 1004000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfComprehensiveIncome CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME R5.xml false false R6.htm 1004501 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfComprehensiveIncomeParenthetical CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) R6.xml false false R7.htm 1005000 - Statement - CONSOLIDATED STATEMENTS OF RETAINED EARNINGS Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfRetainedEarnings CONSOLIDATED STATEMENTS OF RETAINED EARNINGS R7.xml false false R8.htm 1005501 - Statement - CONSOLIDATED STATEMENTS OF RETAINED EARNINGS (Parenthetical) Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfRetainedEarningsParenthetical CONSOLIDATED STATEMENTS OF RETAINED EARNINGS (Parenthetical) R8.xml false false R9.htm 1006000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS R9.xml false false R10.htm 1006501 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) Sheet http://www.ctwater.com/role/ConsolidatedStatementsOfCashFlowsParenthetical CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) R10.xml false false R11.htm 2101100 - Disclosure - Basis of Preparation of Financials Sheet http://www.ctwater.com/role/BasisOfPreparationOfFinancials Basis of Preparation of Financials R11.xml false false R12.htm 2102100 - Disclosure - Pension and Other Post-Retirement Benefits Sheet http://www.ctwater.com/role/PensionAndOtherPostRetirementBenefits Pension and Other Post-Retirement Benefits R12.xml false false R13.htm 2103100 - Disclosure - Earnings per Share Sheet http://www.ctwater.com/role/EarningsPerShare Earnings per Share R13.xml false false R14.htm 2104100 - Disclosure - New Accounting Pronouncements Sheet http://www.ctwater.com/role/NewAccountingPronouncements New Accounting Pronouncements R14.xml false false R15.htm 2105100 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Notes) Notes http://www.ctwater.com/role/AccumulatedOtherComprehensiveIncomeLossNotes Accumulated Other Comprehensive Income (Loss) (Notes) R15.xml false false R16.htm 2105100 - Disclosure - Long-Term Debt Sheet http://www.ctwater.com/role/LongTermDebt Long-Term Debt R16.xml false false R17.htm 2106100 - Disclosure - Fair Value Disclosures Sheet http://www.ctwater.com/role/FairValueDisclosures Fair Value Disclosures R17.xml false false R18.htm 2107100 - Disclosure - Segment Reporting Sheet http://www.ctwater.com/role/SegmentReporting Segment Reporting R18.xml false false R19.htm 2109100 - Disclosure - Income Tax Expense Sheet http://www.ctwater.com/role/IncomeTaxExpense Income Tax Expense R19.xml false false R20.htm 2110100 - Disclosure - Lines of Credit Sheet http://www.ctwater.com/role/LinesOfCredit Lines of Credit R20.xml false false R21.htm 2111100 - Disclosure - Aquisitions Sheet http://www.ctwater.com/role/Aquisitions Aquisitions R21.xml false false R22.htm 2302301 - Disclosure - Pension and Other Post-Retirement Benefits Pension and Post-Retirement Benefits (Tables) Sheet http://www.ctwater.com/role/PensionAndOtherPostRetirementBenefitsPensionAndPostRetirementBenefitsTables Pension and Other Post-Retirement Benefits Pension and Post-Retirement Benefits (Tables) R22.xml false false R23.htm 2303301 - Disclosure - Earnings per Share Earnings per Share (Tables) Sheet http://www.ctwater.com/role/EarningsPerShareEarningsPerShareTables Earnings per Share Earnings per Share (Tables) R23.xml false false R24.htm 2305301 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.ctwater.com/role/AccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) R24.xml false false R25.htm 2305301 - Disclosure - Long-Term Debt Long-Term Debt (Tables) Sheet http://www.ctwater.com/role/LongTermDebtLongTermDebtTables Long-Term Debt Long-Term Debt (Tables) R25.xml false false R26.htm 2306301 - Disclosure - Fair Value Disclosures Fair Value Disclosures (Tables) Sheet http://www.ctwater.com/role/FairValueDisclosuresFairValueDisclosuresTables Fair Value Disclosures Fair Value Disclosures (Tables) R26.xml false false R27.htm 2307301 - Disclosure - Segment Reporting Segment Reporting (Tables) Sheet http://www.ctwater.com/role/SegmentReportingSegmentReportingTables Segment Reporting Segment Reporting (Tables) R27.xml false false R28.htm 2311301 - Disclosure - Aquisitions Acquisitions (Tables) Sheet http://www.ctwater.com/role/AquisitionsAcquisitionsTables Aquisitions Acquisitions (Tables) R28.xml false false R29.htm 2401401 - Disclosure - Basis of Preparation of Financials In text details (Details) Sheet http://www.ctwater.com/role/BasisOfPreparationOfFinancialsInTextDetailsDetails Basis of Preparation of Financials In text details (Details) R29.xml false false R30.htm 2402402 - Disclosure - Pension and Other Post-Retirement Benefits Pension Benefit Cost (Details) Sheet http://www.ctwater.com/role/PensionAndOtherPostRetirementBenefitsPensionBenefitCostDetails Pension and Other Post-Retirement Benefits Pension Benefit Cost (Details) R30.xml false false R31.htm 2402403 - Disclosure - Pension and Other Post-Retirement Benefits In Text Linking (Details) Sheet http://www.ctwater.com/role/PensionAndOtherPostRetirementBenefitsInTextLinkingDetails Pension and Other Post-Retirement Benefits In Text Linking (Details) R31.xml false false R32.htm 2403402 - Disclosure - Earnings per Share Earnings per Share (Details) Sheet http://www.ctwater.com/role/EarningsPerShareEarningsPerShareDetails Earnings per Share Earnings per Share (Details) R32.xml false false R33.htm 2403403 - Disclosure - Earnings per Share EPS in Text Tagging (Details) Sheet http://www.ctwater.com/role/EarningsPerShareEpsInTextTaggingDetails Earnings per Share EPS in Text Tagging (Details) R33.xml false false R34.htm 2405402 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.ctwater.com/role/AccumulatedOtherComprehensiveIncomeLossDetails Accumulated Other Comprehensive Income (Loss) (Details) R34.xml false false R35.htm 2405402 - Disclosure - Long-Term Debt Long-Term Debt (Details) Sheet http://www.ctwater.com/role/LongTermDebtLongTermDebtDetails Long-Term Debt Long-Term Debt (Details) R35.xml false false R36.htm 2405403 - Disclosure - Long-Term Debt Long-Term Debt Parenthetical (Details) Sheet http://www.ctwater.com/role/LongTermDebtLongTermDebtParentheticalDetails Long-Term Debt Long-Term Debt Parenthetical (Details) R36.xml false false R37.htm 2405404 - Disclosure - Long-Term Debt Long-Term Debt in Text (Details) Sheet http://www.ctwater.com/role/LongTermDebtLongTermDebtInTextDetails Long-Term Debt Long-Term Debt in Text (Details) R37.xml false false R38.htm 2406402 - Disclosure - Fair Value Disclosures Fair Value of Financial Instruments (Details) Sheet http://www.ctwater.com/role/FairValueDisclosuresFairValueOfFinancialInstrumentsDetails Fair Value Disclosures Fair Value of Financial Instruments (Details) R38.xml false false R39.htm 2406403 - Disclosure - Fair Value Disclosures In Text Tagging (Details) Sheet http://www.ctwater.com/role/FairValueDisclosuresInTextTaggingDetails Fair Value Disclosures In Text Tagging (Details) R39.xml false false R40.htm 2407402 - Disclosure - Segment Reporting Segment Reporting (Details) Sheet http://www.ctwater.com/role/SegmentReportingSegmentReportingDetails Segment Reporting Segment Reporting (Details) R40.xml false false R41.htm 2407403 - Disclosure - Segment Reporting Segment Reporting Textual Information (Details) Sheet http://www.ctwater.com/role/SegmentReportingSegmentReportingTextualInformationDetails Segment Reporting Segment Reporting Textual Information (Details) R41.xml false false R42.htm 2407404 - Disclosure - Segment Reporting Assets by Segment (Details) Sheet http://www.ctwater.com/role/SegmentReportingAssetsBySegmentDetails Segment Reporting Assets by Segment (Details) R42.xml false false R43.htm 2409401 - Disclosure - Income Tax Expense Income Tax Expense (Details) Sheet http://www.ctwater.com/role/IncomeTaxExpenseIncomeTaxExpenseDetails Income Tax Expense Income Tax Expense (Details) R43.xml false false R44.htm 2410401 - Disclosure - Lines of Credit Lines of Credit (Details) Sheet http://www.ctwater.com/role/LinesOfCreditLinesOfCreditDetails Lines of Credit Lines of Credit (Details) R44.xml false false R45.htm 2411403 - Disclosure - Aquisitions Fair Value of Assets Acquired (Details) Sheet http://www.ctwater.com/role/AquisitionsFairValueOfAssetsAcquiredDetails Aquisitions Fair Value of Assets Acquired (Details) R45.xml false false R46.htm 2411404 - Disclosure - Aquisitions Pro Forma Summary for Prior Year (Details) Sheet http://www.ctwater.com/role/AquisitionsProFormaSummaryForPriorYearDetails Aquisitions Pro Forma Summary for Prior Year (Details) R46.xml false false R47.htm 2411405 - Disclosure - Aquisitions Maine Water Summary (Details) Sheet http://www.ctwater.com/role/AquisitionsMaineWaterSummaryDetails Aquisitions Maine Water Summary (Details) R47.xml false false R48.htm 2411407 - Disclosure - Aquisitions Goodwill Rollforward (Details) Sheet http://www.ctwater.com/role/AquisitionsGoodwillRollforwardDetails Aquisitions Goodwill Rollforward (Details) R48.xml false false All Reports Book All Reports Element ctws_AllowedRateOfReturnOnEquity had a mix of decimals attribute values: 3 4. Element us-gaap_DebtInstrumentFaceAmount had a mix of decimals attribute values: -5 0. Element us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity had a mix of decimals attribute values: -6 -4. Element us-gaap_ProceedsFromIssuanceOfLongTermDebt had a mix of decimals attribute values: -3 0. 'Monetary' elements on report '1001000 - Statement - CONSOLIDATED BALANCE SHEETS' had a mix of different decimal attribute values. 'Monetary' elements on report '2405404 - Disclosure - Long-Term Debt Long-Term Debt in Text (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2407403 - Disclosure - Segment Reporting Segment Reporting Textual Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2411404 - Disclosure - Aquisitions Pro Forma Summary for Prior Year (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2411405 - Disclosure - Aquisitions Maine Water Summary (Details)' had a mix of different decimal attribute values. Process Flow-Through: 1001000 - Statement - CONSOLIDATED BALANCE SHEETS Process Flow-Through: Removing column 'Mar. 31, 2013' Process Flow-Through: Removing column 'Jun. 30, 2012' Process Flow-Through: Removing column 'Mar. 31, 2012' Process Flow-Through: Removing column 'Dec. 31, 2011' Process Flow-Through: 1001501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Process Flow-Through: Removing column 'Jun. 30, 2012' Process Flow-Through: 1003000 - Statement - CONSOLIDATED STATEMENTS OF INCOME Process Flow-Through: 1004000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Process Flow-Through: 1004501 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) Process Flow-Through: 1005000 - Statement - CONSOLIDATED STATEMENTS OF RETAINED EARNINGS Process Flow-Through: 1005501 - Statement - CONSOLIDATED STATEMENTS OF RETAINED EARNINGS (Parenthetical) Process Flow-Through: 1006000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Process Flow-Through: 1006501 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) ctws-20130630.xml ctws-20130630.xsd ctws-20130630_cal.xml ctws-20130630_def.xml ctws-20130630_lab.xml ctws-20130630_pre.xml true true