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REPORTING SEGMENT AND OTHER OPERATIONS DATA - RECONCILIATION OF SEGMENT ASSETS TO CONSOLIDATED (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets |  | $ 4,477,322 | $ 4,143,664
Assets held for sale |  | 207,737 | 206,905
Operating Segments |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 4,517,424 | 4,166,993
Operating Segments | Natural Gas Distribution |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 2,785,817 | 2,663,054
Operating Segments | Clean Energy Ventures |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | [1] | 902,485 | 865,018
Assets held for sale |  | 207,700 | 206,900
Operating Segments | Energy Services |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 583,876 | 396,852
Operating Segments | Midstream |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 245,246 | 242,069
Home Services and Other |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets |  | 120,820 | 114,732
Intercompany Assets |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | [2] | $ (160,922) | $ (138,061)
[1] | Includes assets held for sale of $207.7 million and $206.9 million for December 31, 2018 and September 30, 2018, respectively.
[2] | Consists of transactions between subsidiaries that are eliminated and reclassified in consolidation.

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