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REPORTING SEGMENT AND OTHER OPERATIONS DATA - RECONCILIATION OF SEGMENT INCOME TO CONSOLIDATED (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |
Utility | $ 297,220 | $ 301,420 | $ 516,843 | $ 501,385
Nonutility | 342,394 | 564,835 | 737,807 | 1,176,637
Total operating revenues | 639,614 | 866,255 | 1,254,650 | 1,678,022
Depreciation and amortization | 30,784 | 22,311 | 58,542 | 44,143
Interest income | 1,721 | 419 | 1,907 | 618
Interest expense, net of capitalized interest | 19,203 | 12,509 | 35,273 | 25,995
Income tax provision (benefit) | (1,643) | (2,952) | (1,902) | (9,913)
Equity in earnings of affiliates | 3,589 | 3,371 | 6,978 | 6,532
Net financial (loss) earnings | 106,936 | 112,417 | 147,341 | 166,510
Capital expenditures | 101,166 | 103,101 | 227,349 | 197,402
Investments in equity investees | 757 | 1,457 | 1,266 | 1,457
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating revenues | 627,992 | 860,605 | 1,233,314 | 1,662,734
Depreciation and amortization | 30,395 | 22,090 | 58,359 | 43,937
Interest income | 2,273 | 1,140 | 3,114 | 2,395
Interest expense, net of capitalized interest | 18,866 | 12,608 | 35,238 | 26,569
Income tax provision (benefit) | (3,703) | (1,945) | (4,178) | (8,713)
Net financial (loss) earnings | 106,897 | 114,078 | 145,930 | 168,017
Capital expenditures | 101,277 | 98,046 | 227,334 | 191,616
Operating Segments | Natural Gas Distribution |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Utility | 297,220 | 301,420 | 516,843 | 501,385
Total operating revenues | 297,220 | 301,420 | 516,843 | 501,385
Depreciation and amortization | 18,100 | 13,972 | 34,917 | 27,868
Interest income | 136 | 181 | 243 | 380
Interest expense, net of capitalized interest | 7,473 | 5,762 | 15,305 | 11,865
Income tax provision (benefit) | 19,702 | 12,266 | 28,337 | 18,096
Net financial (loss) earnings | 86,336 | 68,546 | 130,192 | 100,259
Capital expenditures | 72,042 | 79,341 | 149,839 | 139,096
Operating Segments | Clean Energy Ventures |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 5,995 | 11,360 | 12,207 | 26,257
Total operating revenues | 5,995 | 11,360 | 12,207 | 26,257
Depreciation and amortization | 9,871 | 8,091 | 19,308 | 16,014
Interest expense, net of capitalized interest | 4,835 | 4,657 | 9,327 | 10,085
Income tax provision (benefit) | (22,061) | (14,042) | (42,625) | (37,246)
Net financial (loss) earnings | 15,990 | 21,730 | 11,074 | 31,935
Capital expenditures | 24,087 | 20,394 | 69,786 | 52,520
Operating Segments | Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 313,959 | 541,794 | 682,263 | 1,126,754
Total operating revenues | 313,959 | 541,794 | 682,263 | 1,126,754
Depreciation and amortization | 27 | 25 | 56 | 52
Interest income | 52 | 14 | 89 | 14
Interest expense, net of capitalized interest | 937 | 1,624 | 2,163 | 3,511
Income tax provision (benefit) | (2,449) | (1,388) | 8,303 | 8,256
Net financial (loss) earnings | 313 | 19,304 | (2,598) | 27,674
Operating Segments | Midstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 10,401 | 0 | 18,806 | 0
Total operating revenues | 10,401 | 0 | 18,806 | 0
Depreciation and amortization | 2,397 | 2 | 4,078 | 3
Interest income | 2,085 | 945 | 2,782 | 2,001
Interest expense, net of capitalized interest | 5,621 | 565 | 8,443 | 1,108
Income tax provision (benefit) | 1,105 | 1,219 | 1,807 | 2,181
Equity in earnings of affiliates | 3,921 | 3,998 | 7,585 | 7,799
Net financial (loss) earnings | 4,258 | 4,498 | 7,262 | 8,149
Capital expenditures | 5,148 | (1,689) | 7,709 | 0
Investments in equity investees | 757 | 1,457 | 1,266 | 1,457
Intercompany |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 326 | 652 | 741 | 1,197
Intercompany | Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | (258) | 6,031 | 1,853 | 8,338
Intercompany | Midstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 675 | 0 | 1,342 | 0
Home Services and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 12,039 | 11,681 | 24,531 | 23,626
Total operating revenues | 12,039 | 11,681 | 24,531 | 23,626
Depreciation and amortization | 250 | 222 | 496 | 443
Interest income | 208 | 669 | 699 | 1,105
Interest expense, net of capitalized interest | 565 | 611 | 837 | 1,003
Income tax provision (benefit) | 1,956 | (659) | 2,175 | (851)
Net financial (loss) earnings | 148 | (1,581) | 1,257 | (1,505)
Capital expenditures | (111) | 5,055 | 15 | 5,786
Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | (743) | (6,683) | (3,936) | (9,535)
Depreciation and amortization | 139 | (1) | (313) | (237)
Interest income | (760) | (1,390) | (1,906) | (2,882)
Interest expense, net of capitalized interest | (228) | (710) | (802) | (1,577)
Income tax provision (benefit) | 104 | (348) | 101 | (349)
Equity in earnings of affiliates | (332) | (627) | (607) | (1,267)
Net financial (loss) earnings | $ (109) | $ (80) | $ 154 | $ (2)

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