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REPORTING SEGMENT AND OTHER OPERATIONS DATA - RECONCILIATION OF SEGMENT INCOME TO CONSOLIDATED (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Segment Reporting Information [Line Items] |  |  |  |
Utility | $ 144,971 | $ 199,357 | $ 902,880 | $ 937,266
Nonutility | 119,104 | 352,978 | 728,789 | 1,203,227
Operating revenues | 264,075 | 552,335 | 1,631,669 | 2,140,493
Depreciation and amortization | 38,877 | 32,872 | 113,650 | 94,700
Interest income | 2,390 | 684 | 6,585 | 1,673
Interest expense, net of capitalized interest | 30,119 | 21,411 | 89,871 | 59,814
Income tax provision (benefit) | (20,505) | 4,434 | 43,059 | 64,051
Equity in earnings of affiliates | 701 | 4,801 | 2,778 | 6,145
Net financial earnings (loss) | 9,670 | (3,551) | 232,264 | 192,425
Capital expenditures | 117,103 | 139,804 | 380,214 | 441,114
Return of capital from equity investees | 0 | (1,479) | 0 | (5,479)
Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 9,500 | 10,300 | 39,000 | 42,700
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 250,859 | 537,695 | 1,602,878 | 2,105,663
Depreciation and amortization | 38,650 | 32,666 | 112,981 | 94,211
Interest income | 2,647 | 751 | 7,170 | 1,893
Interest expense, net of capitalized interest | 29,971 | 21,276 | 89,412 | 59,310
Income tax provision (benefit) | (20,440) | 3,995 | 41,544 | 63,662
Net financial earnings (loss) | 8,912 | (3,927) | 233,663 | 191,718
Capital expenditures | 116,910 | 139,484 | 379,121 | 440,552
Operating Segments | Natural Gas Distribution, External Customers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Utility | 144,971 | 199,357 | 902,880 | 937,266
Operating Segments | Clean Energy Ventures, External Customers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 13,178 | 13,795 | 40,376 | 35,805
Operating Segments | Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 69,542 | 309,236 | 579,494 | 1,086,093
Operating revenues | 69,542 | 309,236 | 579,494 | 1,086,093
Depreciation and amortization | 51 | 34 | 170 | 94
Interest income | 310 | 0 | 959 | 0
Interest expense, net of capitalized interest | 2,467 | 1,115 | 8,274 | 2,585
Income tax provision (benefit) | (2,934) | 2,338 | 23,046 | 22,053
Net financial earnings (loss) | (1,604) | (5,003) | 72,054 | 42,504
Operating Segments | Storage and Transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 21,435 | 15,779 | 66,452 | 40,168
Operating revenues | 21,435 | 15,779 | 66,452 | 40,168
Depreciation and amortization | 6,102 | 3,323 | 18,064 | 8,027
Interest income | 1,841 | 501 | 4,926 | 1,259
Interest expense, net of capitalized interest | 6,430 | 3,177 | 19,265 | 7,160
Income tax provision (benefit) | 535 | 1,675 | 3,074 | 2,732
Equity in earnings of affiliates | 377 | 5,274 | 2,263 | 7,586
Net financial earnings (loss) | 2,358 | 3,526 | 11,051 | 11,113
Capital expenditures | 3,450 | 20,560 | 33,291 | 129,608
Return of capital from equity investees | 0 | (1,479) | 0 | (5,479)
Operating Segments | Natural Gas Distribution |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 144,971 | 199,357 | 902,880 | 937,266
Depreciation and amortization | 25,825 | 23,951 | 76,034 | 70,188
Interest income | 496 | 250 | 1,285 | 634
Interest expense, net of capitalized interest | 13,226 | 11,474 | 40,814 | 33,233
Income tax provision (benefit) | 196 | 1,508 | 38,503 | 44,401
Net financial earnings (loss) | 891 | 2,648 | 156,252 | 156,511
Capital expenditures | 102,555 | 79,976 | 277,226 | 205,440
Operating Segments | Clean Energy Ventures |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 13,178 | 13,795 | 40,376 | 35,805
Depreciation and amortization | 6,672 | 5,358 | 18,713 | 15,902
Interest expense, net of capitalized interest | 7,848 | 5,510 | 21,059 | 16,332
Income tax provision (benefit) | (18,237) | (1,526) | (23,079) | (5,524)
Net financial earnings (loss) | 7,267 | (5,098) | (5,694) | (18,410)
Capital expenditures | 10,905 | 38,948 | 68,604 | 105,504
Intercompany |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 6 | 52 | 202 | 232
Intercompany | Natural Gas Distribution, External Customers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Utility | 337 | 338 | 1,012 | 1,013
Intercompany | Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 630 | (1,421) | 9,190 | 3,611
Intercompany | Storage and Transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 766 | 611 | 3,474 | 1,707
Home Services and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 14,949 | 14,168 | 42,467 | 41,161
Operating revenues | 14,949 | 14,168 | 42,467 | 41,161
Depreciation and amortization | 227 | 207 | 669 | 614
Interest income | 753 | 225 | 2,141 | 527
Interest expense, net of capitalized interest | 148 | 135 | 459 | 504
Income tax provision (benefit) | 429 | 180 | 1,134 | 682
Net financial earnings (loss) | 523 | 215 | 1,307 | 1,113
Capital expenditures | 193 | 320 | 1,093 | 562
Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | (1,739) | 420 | (13,878) | (6,563)
Depreciation and amortization | 0 | (1) | 0 | (125)
Interest income | (1,010) | (292) | (2,726) | (747)
Income tax provision (benefit) | (494) | 259 | 381 | (293)
Equity in earnings of affiliates | 324 | (473) | 515 | (1,441)
Net financial earnings (loss) | $ 235 | $ 161 | $ (2,706) | $ (406)

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