2.4.0.6 Html 53 246 1 false 15 0 false 5 false false R1.htm 0001 - Document - Document and Entity Information Sheet http://corninggas.com/role/DocumentAndEntityInformation Document and Entity Information true false R2.htm 0002 - Statement - Consolidated Balance Sheets (Unaudited) Sheet http://corninggas.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets (Unaudited) false false R3.htm 0003 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://corninggas.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) false false R4.htm 0004 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://corninggas.com/role/ConsolidatedStatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income (Unaudited) false false R5.htm 0005 - Statement - Consolidated Statements of Cash Flows Sheet http://corninggas.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows false false R6.htm 0006 - Disclosure - Basis of Presentation Sheet http://corninggas.com/role/BasisOfPresentation Basis of Presentation false false R7.htm 0007 - Disclosure - New Accounting Standards Sheet http://corninggas.com/role/NewAccountingStandards New Accounting Standards false false R8.htm 0008 - Disclosure - Other Comprehensive Income (Loss) Sheet http://corninggas.com/role/OtherComprehensiveIncomeLoss Other Comprehensive Income (Loss) false false R9.htm 0009 - Disclosure - Pension and Other Post-retirement Benefit Plans Sheet http://corninggas.com/role/PensionAndOtherPost-RetirementBenefitPlans Pension and Other Post-retirement Benefit Plans false false R10.htm 0010 - Disclosure - Rate Cases Sheet http://corninggas.com/role/RateCases Rate Cases false false R11.htm 0011 - Disclosure - Financing Activities Sheet http://corninggas.com/role/FinancingActivities Financing Activities false false R12.htm 0012 - Disclosure - Director Compensation Sheet http://corninggas.com/role/DirectorCompensation Director Compensation false false R13.htm 0013 - Disclosure - Fair Value Measurements Sheet http://corninggas.com/role/FairValueMeasurements Fair Value Measurements false false R14.htm 0014 - Disclosure - Stock Options Sheet http://corninggas.com/role/StockOptions Stock Options false false R15.htm 0015 - Disclosure - 311 Transportation Agreement /Compressor Station Sheet http://corninggas.com/role/TransportationAgreementCompressorStation 311 Transportation Agreement /Compressor Station false false R16.htm 0016 - Disclosure - Dividends Sheet http://corninggas.com/role/Dividends Dividends false false R17.htm 0017 - Disclosure - Leatherstocking Gas Company, LLC Sheet http://corninggas.com/role/LeatherstockingGasCompanyLlc Leatherstocking Gas Company, LLC false false R18.htm 0018 - Disclosure - Stock Dividend Sheet http://corninggas.com/role/StockDividend Stock Dividend false false R19.htm 0019 - Disclosure - Settlement of Lawsuits Sheet http://corninggas.com/role/SettlementOfLawsuits Settlement of Lawsuits false false R20.htm 0020 - Disclosure - Effective Tax Rate Sheet http://corninggas.com/role/EffectiveTaxRate Effective Tax Rate false false R21.htm 0021 - Disclosure - Private Placement of Common Stock Sheet http://corninggas.com/role/PrivatePlacementOfCommonStock Private Placement of Common Stock false false R22.htm 0022 - Disclosure - Employment Agreements Sheet http://corninggas.com/role/EmploymentAgreements Employment Agreements false false R23.htm 0023 - Disclosure - Rights Offering Sheet http://corninggas.com/role/RightsOffering Rights Offering false false R24.htm 0024 - Disclosure - Subsequent Events Sheet http://corninggas.com/role/SubsequentEvents Subsequent Events false false R25.htm 0025 - Disclosure - Other Comprehensive Income (Loss) (Tables) Sheet http://corninggas.com/role/OtherComprehensiveIncomeLossTables Other Comprehensive Income (Loss) (Tables) false false R26.htm 0026 - Disclosure - Pension and Other Post-retirement Benefit Plans (Tables) Sheet http://corninggas.com/role/PensionAndOtherPost-RetirementBenefitPlansTables Pension and Other Post-retirement Benefit Plans (Tables) false false R27.htm 0027 - Disclosure - Director Compensation (Tables) Sheet http://corninggas.com/role/DirectorCompensationTables Director Compensation (Tables) false false R28.htm 0028 - Disclosure - Fair Value Measurements (Tables) Sheet http://corninggas.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) false false R29.htm 0029 - Disclosure - Stock Options (Tables) Sheet http://corninggas.com/role/StockOptionsTables Stock Options (Tables) false false R30.htm 0030 - Disclosure - Effective Tax Rate (Tables) Sheet http://corninggas.com/role/EffectiveTaxRateTables Effective Tax Rate (Tables) false false R31.htm 0031 - Disclosure - Other Comprehensive Income (Loss) (Details Narrative) Sheet http://corninggas.com/role/OtherComprehensiveIncomeLossDetailsNarrative Other Comprehensive Income (Loss) (Details Narrative) false false R32.htm 0032 - Disclosure - Other Comprehensive Income (Loss) (Details) Sheet http://corninggas.com/role/OtherComprehensiveIncomeLossDetails Other Comprehensive Income (Loss) (Details) false false R33.htm 0033 - Disclosure - Pension and Other Post-retirement Benefit Plans (Details Narrative) Sheet http://corninggas.com/role/PensionAndOtherPost-RetirementBenefitPlansDetailsNarrative Pension and Other Post-retirement Benefit Plans (Details Narrative) false false R34.htm 0034 - Disclosure - Pension and Other Post-retirement Benefit Plans (Details) Sheet http://corninggas.com/role/PensionAndOtherPost-RetirementBenefitPlansDetails Pension and Other Post-retirement Benefit Plans (Details) false false R35.htm 0035 - Disclosure - Rate Cases (Details Narrative) Sheet http://corninggas.com/role/RateCasesDetailsNarrative Rate Cases (Details Narrative) false false R36.htm 0036 - Disclosure - Financing Activities (Details Narrative) Sheet http://corninggas.com/role/FinancingActivitiesDetailsNarrative Financing Activities (Details Narrative) false false R37.htm 0037 - Disclosure - Director Compensation (Details Narrative) Sheet http://corninggas.com/role/DirectorCompensationDetailsNarrative Director Compensation (Details Narrative) false false R38.htm 0038 - Disclosure - Director Compensation (Details) Sheet http://corninggas.com/role/DirectorCompensationDetails Director Compensation (Details) false false R39.htm 0039 - Disclosure - Fair Value Measurements (Details) Sheet http://corninggas.com/role/FairValueMeasurementsDetails Fair Value Measurements (Details) false false R40.htm 0040 - Disclosure - Fair Value Measurements (Details 1) Sheet http://corninggas.com/role/FairValueMeasurementsDetails1 Fair Value Measurements (Details 1) false false R41.htm 0041 - Disclosure - Stock Options (Details Narrative) Sheet http://corninggas.com/role/StockOptionsDetailsNarrative Stock Options (Details Narrative) false false R42.htm 0042 - Disclosure - Stock Options (Details) Sheet http://corninggas.com/role/StockOptionsDetails Stock Options (Details) false false R43.htm 0043 - Disclosure - Stock Options (Details 1) Sheet http://corninggas.com/role/StockOptionsDetails1 Stock Options (Details 1) false false R44.htm 0044 - Disclosure - 311 Transportation Agreement /Compressor Station (Details Narrative) Sheet http://corninggas.com/role/TransportationAgreementCompressorStationDetailsNarrative 311 Transportation Agreement /Compressor Station (Details Narrative) false false R45.htm 0045 - Disclosure - Dividends (Details Narrative) Sheet http://corninggas.com/role/DividendsDetailsNarrative Dividends (Details Narrative) false false R46.htm 0046 - Disclosure - Leatherstocking Gas Company, LLC (Details Narrative) Sheet http://corninggas.com/role/LeatherstockingGasCompanyLlcDetailsNarrative Leatherstocking Gas Company, LLC (Details Narrative) false false R47.htm 0047 - Disclosure - Settlement of Lawsuits (Details Narrative) Sheet http://corninggas.com/role/SettlementOfLawsuitsDetailsNarrative Settlement of Lawsuits (Details Narrative) false false R48.htm 0048 - Disclosure - Effective Tax Rate (Details Narrative) Sheet http://corninggas.com/role/EffectiveTaxRateDetailsNarrative Effective Tax Rate (Details Narrative) false false R49.htm 0049 - Disclosure - Effective Tax Rate (Details) Sheet http://corninggas.com/role/EffectiveTaxRateDetails Effective Tax Rate (Details) false false R50.htm 0050 - Disclosure - Effective Tax Rate (Details 1) Sheet http://corninggas.com/role/EffectiveTaxRateDetails1 Effective Tax Rate (Details 1) false false R51.htm 0051 - Disclosure - Private Placement of Common Stock (Details Narrative) Sheet http://corninggas.com/role/PrivatePlacementOfCommonStockDetailsNarrative Private Placement of Common Stock (Details Narrative) false false R52.htm 0052 - Disclosure - Rights Offering (Details Narrative) Sheet http://corninggas.com/role/RightsOfferingDetailsNarrative Rights Offering (Details Narrative) false false R53.htm 0053 - Disclosure - Subsequent Events (Details Narrative) Sheet http://corninggas.com/role/SubsequentEventsDetailsNarrative Subsequent Events (Details Narrative) false false All Reports Book All Reports Process Flow-Through: 0002 - Statement - Consolidated Balance Sheets (Unaudited) Process Flow-Through: Removing column 'Sep. 30, 2010' Process Flow-Through: 0003 - Statement - Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 0004 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Process Flow-Through: 0005 - Statement - Consolidated Statements of Cash Flows cnig-20120630.xml cnig-20120630.xsd cnig-20120630_cal.xml cnig-20120630_def.xml cnig-20120630_lab.xml cnig-20120630_pre.xml true true