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DERIVATIVE INSTRUMENTS - OFFSETTING OF ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Sep. 30, 2019
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Home Services and Other |  |
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | $ 10,796 |
Offsetting Derivative Instruments | 0 |
Financial Collateral Received/Pledged | 0 |
Net Amounts | 10,796 |
Home Services and Other | Interest rate contracts |  |
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 10,796 |
Offsetting Derivative Instruments | 0 |
Financial Collateral Received/Pledged | 0 |
Net Amounts | 10,796 |
Energy Services |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 35,648 | $ 32,080
Offsetting Derivative Instruments | (17,711) | (22,553)
Financial Collateral Received/Pledged | (200) | (200)
Net Amounts | 17,737 | 9,327
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 54,519 | 75,629
Offsetting Derivative Instruments | (17,711) | (22,553)
Financial Collateral Received/Pledged | 0 | (15,516)
Net Amounts | 36,808 | 37,560
Energy Services | Physical commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 8,111 | 8,557
Offsetting Derivative Instruments | (3,097) | (2,906)
Financial Collateral Received/Pledged | (200) | (200)
Net Amounts | 4,814 | 5,451
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 39,690 | 40,181
Offsetting Derivative Instruments | (3,097) | (2,906)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 36,593 | 37,275
Energy Services | Financial commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 27,499 | 23,522
Offsetting Derivative Instruments | (14,576) | (19,646)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 12,923 | 3,876
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 14,576 | 35,162
Offsetting Derivative Instruments | (14,576) | (19,646)
Financial Collateral Received/Pledged | 0 | (15,516)
Net Amounts | 0 | 0
Energy Services | Foreign currency contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 38 | 1
Offsetting Derivative Instruments | (38) | (1)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 0 | 0
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 253 | 286
Offsetting Derivative Instruments | (38) | (1)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 215 | 285
Natural Gas Distribution |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 66 | 449
Offsetting Derivative Instruments | (39) | (391)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 27 | 58
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 5,379 | 815
Offsetting Derivative Instruments | (39) | (391)
Financial Collateral Received/Pledged | (190) | (188)
Net Amounts | 5,150 | 236
Natural Gas Distribution | Physical commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 66 | 67
Offsetting Derivative Instruments | (39) | (9)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 27 | 58
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 133 | 245
Offsetting Derivative Instruments | (39) | (9)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 94 | 236
Natural Gas Distribution | Financial commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets |  | 382
Offsetting Derivative Instruments |  | (382)
Financial Collateral Received/Pledged |  | 0
Net Amounts |  | 0
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 190 | 570
Offsetting Derivative Instruments | 0 | (382)
Financial Collateral Received/Pledged | (190) | (188)
Net Amounts | 0 | $ 0
Natural Gas Distribution | Interest rate contracts |  |
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 5,056 |
Offsetting Derivative Instruments | 0 |
Financial Collateral Received/Pledged | 0 |
Net Amounts | $ 5,056 |

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