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COMMITMENTS AND CONTINGENT LIABILITIES - SCHEDULE OF FUTURE COMMITTED EXPENSES (Details) $ in Thousands | 12 Months Ended
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Sep. 30, 2020 USD ($)
Long-term Purchase Commitment [Line Items] |
Current charges recoverable through BGSS | $ 124,700
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 378,626
2021 | 231,779
2022 | 166,285
2023 | 124,321
2024 | 106,037
Thereafter | $ 593,464
Minimum |
Long-term Purchase Commitment [Line Items] |
Storage and pipeline capacity, fixed period | 1 year
Maximum |
Long-term Purchase Commitment [Line Items] |
Storage and pipeline capacity, fixed period | 10 years
Energy Services |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | $ 249,589
2021 | 68,079
2022 | 38,368
2023 | 26,435
2024 | 19,598
Thereafter | 37,469
Energy Services | Natural gas purchases |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 151,270
2021 | 1,600
2022 | 0
2023 | 0
2024 | 0
Thereafter | 0
Energy Services | Storage demand fees |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 21,857
2021 | 13,028
2022 | 8,632
2023 | 3,748
2024 | 2,488
Thereafter | 942
Energy Services | Pipeline demand fees |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 76,462
2021 | 53,451
2022 | 29,736
2023 | 22,687
2024 | 17,110
Thereafter | 36,527
Natural Gas Distribution |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 129,037
2021 | 163,700
2022 | 127,917
2023 | 97,886
2024 | 86,439
Thereafter | 555,995
Natural Gas Distribution | Natural gas purchases |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 4,377
2021 | 0
2022 | 0
2023 | 0
2024 | 0
Thereafter | 0
Natural Gas Distribution | Storage demand fees |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 36,096
2021 | 32,122
2022 | 20,303
2023 | 12,768
2024 | 6,830
Thereafter | 3,530
Natural Gas Distribution | Pipeline demand fees |
Purchase Obligation, Fiscal Year Maturity [Abstract] |
2020 | 88,564
2021 | 131,578
2022 | 107,614
2023 | 85,118
2024 | 79,609
Thereafter | $ 552,465

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