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BUSINESS SEGMENT AND OTHER OPERATIONS DATA - RECONCILIATION OF SEGMENT ASSETS TO CONSOLIDATED (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | $ 3,928,507 | $ 3,718,570 | $ 3,284,357
Operating Segments |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 3,922,001 | 3,696,982 | 3,252,206
Operating Segments | Natural Gas Distribution |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 2,519,578 | 2,517,401 | 2,305,293
Operating Segments | Clean Energy Ventures |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 771,340 | 665,696 | 504,885
Operating Segments | Energy Services |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 398,277 | 327,626 | 260,021
Operating Segments | Midstream |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 232,806 | 186,259 | 182,007
Home Services and Other |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 114,801 | 109,487 | 88,880
Eliminations |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | $ (108,295) | $ (87,899) | $ (56,729)

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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