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capital expenditures fund30false 3egas_AcquisitionDepositegas_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-2250000-2250000falsefalsefalsexbrli:monetaryItemTypemonetaryAcquisition deposit.No definition available.false2Acquisition deposit31false 3egas_CustomerAdvancesForConstructionCashFlowsFromInvestingActivitiesegas_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse2615526155falsefalsefalse2truefalsefalse142448142448falsefalsefalsexbrli:monetaryItemTypemonetaryCustomer advances for construction.No definition available.false2Customer advances for construction32false 3us-gaap_ProceedsFromContributionInAidOfConstructionus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse273510273510falsefalsefalse2truefalsefalse4740247402falsefalsefalsexbrli:monetaryItemTypemonetaryThe cash inflow from developers, builders, governmental agencies and municipalities that provide the entity with cash to extend its construction services to their properties.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 false2Contributions in aid of construction33false 3us-gaap_NetCashProvidedByUsedInInvestingActivitiesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse-7531693-7531693falsefalsefalse2truefalsefalse-12343415-12343415falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 true2Net cash used in investing activities34true 2us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0CASH FLOWS FROM FINANCING ACTIVITIES35false 3us-gaap_ProceedsFromLinesOfCreditus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse82070008207000falsefalsefalse2truefalsefalse70123777012377falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 false2Proceeds from lines of credit36false 3us-gaap_RepaymentsOfDebtus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-16267755-16267755falsefalsefalse2truefalsefalse-11510000-11510000falsefalsefalsexbrli:monetaryItemTypemonetaryThe cash outflow during the period from the repayment of aggregate short-term and long-term debt. 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This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 false2Exercise of stock options40false 3egas_RestrictedCashegas_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse16511651falsefalsefalse2truefalsefalse-759397-759397falsefalsefalsexbrli:monetaryItemTypemonetaryRestricted cash.No definition available.false2Restricted cash - debt service fund41false 3us-gaap_PaymentsOfDividendsCommonStockus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-2275896-2275896falsefalsefalse2truefalsefalse-2201918-2201918falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 false2Dividends paid42false 3us-gaap_NetCashProvidedByUsedInFinancingActivitiesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse-10562158-10562158falsefalsefalse2truefalsefalse-7937513-7937513falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 true2Net cash used in financing activities43false 2us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse-651776-651776falsefalsefalse2truefalsefalse-8047701-8047701falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 true2NET DECREASE IN CASH AND CASH EQUIVALENTS44false 2us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaap_truedebitinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse34351173435117falsefalsefalse2truefalsefalse1050484510504845falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. 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Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. 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-Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 false2CASH AND CASH EQUIVALENTS, END OF PERIOD46true 2us-gaap_SupplementalCashFlowInformationAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION47false 3us-gaap_InterestPaidus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse13824451382445falsefalsefalse2truefalsefalse10666261066626falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of cash paid for interest during the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef 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-Paragraph 29, 30, 31 -Article 5 false2Shares issued to purchase JDOG Marketing51false 3egas_NoncashOrPartNoncashAcquisitionContingentConsiderationegas_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse14750001475000falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryNoncash or part noncash acquisition contingent consideration.No definition available.false2Contingent consideration issued to purchase JDOG Marketing52false 3us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1us-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2160021600falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. 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"Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 false2Plant, property and equipment acquired from JDOG purchase53false 3us-gaap_NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1us-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse25000002500000falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of intangibles that an Entity acquires in a noncash (or part noncash) acquisition. 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"Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 false2Customer relationships acquired from JDOG purchase54false 3egas_NoncashOrPartNoncashAcquisitionGoodwillAcquiredegas_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse16255181625518falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryNoncash or part noncash acquisition goodwill acquired.No definition available.false2Goodwill acquired from JDOG purchase55false 3us-gaap_NoncashOrPartNoncashAcquisitionPayablesAssumed1us-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3091930919falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of payables that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. 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