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REPORTING SEGMENT AND OTHER OPERATIONS DATA - RECONCILIATION OF SEGMENT INCOME TO CONSOLIDATED (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Utility |  | $ 199,965 | $ 209,787
Nonutility |  | 611,802 | 495,518
Total operating revenues |  | 811,767 | 705,305
Depreciation and amortization |  | 21,832 | 21,854
Interest income | [1] | 199 | 56
Interest expense, net of capitalized interest |  | 13,486 | 11,905
Income tax provision (benefit) |  | (6,961) | (50,168)
Equity in earnings of affiliates |  | 3,161 | 3,264
Net financial earnings | [2] | 54,093 | 135,333
Capital expenditures |  | 94,301 | 67,090
Investments in equity investees |  | 0 | 7,202
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating revenues |  | 802,129 | 701,764
Depreciation and amortization |  | 21,847 | 21,733
Interest income | [1] | 1,255 | 783
Interest expense, net of capitalized interest |  | 13,961 | 12,310
Income tax provision (benefit) |  | (6,768) | (61,384)
Net financial earnings |  | 53,939 | 143,144
Capital expenditures |  | 93,570 | 65,777
Operating Segments | Natural Gas Distribution |  |  |
Segment Reporting Information [Line Items] |  |  |
Utility |  | 199,965 | 209,787
Depreciation and amortization |  | 13,896 | 12,783
Interest income | [1] | 199 | 119
Interest expense, net of capitalized interest |  | 6,103 | 6,536
Income tax provision (benefit) |  | 5,830 | 11,704
Net financial earnings |  | 31,713 | 34,109
Capital expenditures |  | 59,755 | 47,390
Operating Segments | Clean Energy Ventures |  |  |
Segment Reporting Information [Line Items] |  |  |
Nonutility |  | 14,897 | 13,996
Depreciation and amortization |  | 7,923 | 8,935
Interest expense, net of capitalized interest |  | 5,428 | 4,208
Income tax provision (benefit) |  | (23,204) | (73,988)
Net financial earnings |  | 10,205 | 71,250
Capital expenditures |  | 32,126 | 18,387
Operating Segments | Energy Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Nonutility | [3] | 584,960 | 472,171
Depreciation and amortization | [4] | 27 | 14
Interest expense, net of capitalized interest |  | 1,887 | 1,257
Income tax provision (benefit) |  | 9,644 | 13,743
Net financial earnings |  | 8,370 | 20,274
Operating Segments | Midstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and amortization |  | 1 | 1
Interest income | [1] | 1,056 | 664
Interest expense, net of capitalized interest |  | 543 | 309
Income tax provision (benefit) |  | 962 | (12,843)
Equity in earnings of affiliates |  | 3,801 | 4,129
Net financial earnings |  | 3,651 | 17,511
Capital expenditures |  | 1,689 | 0
Investments in equity investees |  | 0 | 7,202
Intercompany |  |  |
Segment Reporting Information [Line Items] |  |  |
Nonutility |  | 545 | 606
Intercompany | Energy Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Nonutility |  | 2,307 | 5,810
Home Services and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Nonutility |  | 11,945 | 9,351
Depreciation and amortization |  | 221 | 188
Interest income | [1] | 436 | 204
Interest expense, net of capitalized interest |  | 392 | 90
Income tax provision (benefit) |  | (192) | 11,698
Net financial earnings |  | 76 | (7,716)
Capital expenditures |  | 731 | 1,313
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Nonutility |  | (2,852) | (6,416)
Depreciation and amortization |  | (236) | (67)
Interest income | [1] | (1,492) | (931)
Interest expense, net of capitalized interest |  | (867) | (495)
Income tax provision (benefit) |  | (1) | (482)
Equity in earnings of affiliates |  | (640) | (865)
Net financial earnings |  | $ 78 | $ (95)
[1] | Included in other income, net on the Unaudited Condensed Consolidated Statements of Operations.
[2] | Includes income tax benefit related to the Tax Act of $57.6 million, for the three months ended December 31, 2017.
[3] | Includes sales to Canada, which are immaterial
[4] | The amortization of acquired wholesale energy contracts is excluded above and is included in gas purchases - nonutility on the Unaudited Condensed Consolidated Statements of Operations.

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