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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, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Segment Reporting Information [Line Items] |  |  |  |
Utility | $ 463,474 | $ 310,167 | $ 737,909 | $ 505,896
Nonutility | 448,842 | 492,020 | 850,249 | 750,596
Operating revenues | 912,316 | 802,187 | 1,588,158 | 1,256,492
Depreciation and amortization | 31,435 | 26,848 | 61,828 | 54,210
Interest income | 488 | 1,057 | 989 | 1,726
Interest expense, net of capitalized interest | 18,926 | 20,153 | 38,403 | 39,939
Income tax provision (benefit) | 28,810 | 39,057 | 59,617 | 56,498
Impairment of equity method investment | 769 | 2,804 | 1,344 | 5,479
Net financial earnings (loss) | 130,206 | 170,604 | 195,976 | 215,261
Capital expenditures | 137,012 | 136,007 | 301,310 | 245,887
Investments in (return of capital from) equity investees | (4,000) |  | (4,000) |
Investments in (return of capital from) equity investees |  | 196 |  | 482
Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 10,300 |  | 32,400 |
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 901,626 | 793,138 | 1,567,968 | 1,237,818
Depreciation and amortization | 31,258 | 26,537 | 61,545 | 53,821
Interest income | 572 | 1,167 | 1,142 | 1,943
Interest expense, net of capitalized interest | 18,801 | 18,425 | 38,034 | 37,095
Income tax provision (benefit) | 27,661 | 36,909 | 59,667 | 54,958
Net financial earnings (loss) | 130,857 | 172,908 | 195,645 | 217,109
Capital expenditures | 136,849 | 135,882 | 301,068 | 245,076
Operating Segments | Natural Gas Distribution, External Customers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Utility | 463,474 | 310,167 | 737,909 | 505,896
Operating Segments | Clean Energy Ventures, External Customers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 11,827 | 6,476 | 22,010 | 12,846
Operating Segments | Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 411,069 | 459,766 | 776,857 | 687,115
Operating revenues | 411,069 | 459,766 | 776,857 | 687,115
Depreciation and amortization | 32 | 13 | 60 | 55
Interest expense, net of capitalized interest | 795 | 575 | 1,470 | 1,255
Income tax provision (benefit) | (790) | 23,128 | 19,715 | 35,250
Net financial earnings (loss) | 29,940 | 96,528 | 47,507 | 98,028
Operating Segments | Storage and Transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 12,805 | 13,257 | 24,389 | 25,704
Operating revenues | 12,805 | 13,257 | 24,389 | 25,704
Depreciation and amortization | 2,571 | 2,364 | 4,704 | 5,004
Interest income | 381 | 851 | 758 | 1,545
Interest expense, net of capitalized interest | 1,847 | 3,578 | 3,983 | 7,560
Income tax provision (benefit) | 714 | 873 | 1,057 | 1,519
Impairment of equity method investment | 1,256 | 3,386 | 2,312 | 6,579
Net financial earnings (loss) | 4,625 | 4,711 | 7,587 | 8,219
Capital expenditures | 43,673 | 20,094 | 109,048 | 27,707
Investments in (return of capital from) equity investees | (4,000) |  | (4,000) |
Investments in (return of capital from) equity investees |  | 196 |  | 482
Operating Segments | Natural Gas Distribution |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 463,474 | 310,167 | 737,909 | 505,896
Depreciation and amortization | 23,344 | 19,475 | 46,237 | 38,644
Interest income | 191 | 76 | 384 | 158
Interest expense, net of capitalized interest | 10,764 | 9,006 | 21,759 | 17,980
Income tax provision (benefit) | 29,689 | 15,622 | 42,893 | 23,989
Net financial earnings (loss) | 102,783 | 80,541 | 153,863 | 130,008
Capital expenditures | 52,000 | 97,239 | 125,464 | 176,485
Operating Segments | Clean Energy Ventures |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 11,827 | 6,476 | 22,010 | 12,846
Depreciation and amortization | 5,311 | 4,685 | 10,544 | 10,118
Interest income | 0 | 240 | 0 | 240
Interest expense, net of capitalized interest | 5,395 | 5,266 | 10,822 | 10,300
Income tax provision (benefit) | (1,952) | (2,714) | (3,998) | (5,800)
Net financial earnings (loss) | (6,491) | (8,872) | (13,312) | (19,146)
Capital expenditures | 41,176 | 18,549 | 66,556 | 40,884
Intercompany |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 81 | 252 | 180 | 419
Intercompany | Natural Gas Distribution, External Customers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Utility | 338 | 0 | 675 | 0
Intercompany | Energy Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 1,576 | 2,803 | 5,032 | 4,931
Intercompany | Storage and Transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 537 | 669 | 1,096 | 1,326
Home Services and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | 13,141 | 12,521 | 26,993 | 24,931
Operating revenues | 13,141 | 12,521 | 26,993 | 24,931
Depreciation and amortization | 203 | 227 | 407 | 487
Interest income | 147 | 127 | 302 | 259
Interest expense, net of capitalized interest | 125 | 1,728 | 369 | 2,844
Income tax provision (benefit) | 256 | (59) | 502 | 59
Net financial earnings (loss) | 451 | 747 | 898 | 685
Capital expenditures | 163 | 125 | 242 | 811
Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Nonutility | (2,532) | (3,724) | (6,983) | (6,676)
Depreciation and amortization | (26) | 84 | (124) | (98)
Interest income | (231) | (237) | (455) | (476)
Income tax provision (benefit) | 893 | 2,207 | (552) | 1,481
Impairment of equity method investment | (487) | (582) | (968) | (1,100)
Net financial earnings (loss) | $ (1,102) | $ (3,051) | $ (567) | $ (2,533)

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