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DERIVATIVE INSTRUMENTS - OFFSETTING OF ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | ---
Energy Services |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | $ 51,349 | $ 39,094
Offsetting Derivative Instruments | (32,601) | (16,294)
Financial Collateral Received/Pledged | (5,527) | (200)
Net Amounts | 13,221 | 22,600
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 106,482 | 48,186
Offsetting Derivative Instruments | (32,601) | (16,294)
Financial Collateral Received/Pledged | (38,231) | (8,766)
Net Amounts | 35,650 | 23,126
Energy Services | Physical commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 16,048 | 21,715
Offsetting Derivative Instruments | (3,137) | (2,173)
Financial Collateral Received/Pledged | (200) | (200)
Net Amounts | 12,711 | 19,342
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 38,787 | 25,299
Offsetting Derivative Instruments | (3,137) | (2,173)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 35,650 | 23,126
Energy Services | Financial commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 35,265 | 17,335
Offsetting Derivative Instruments | (29,434) | (14,121)
Financial Collateral Received/Pledged | (5,327) | 0
Net Amounts | 504 | 3,214
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 67,665 | 22,887
Offsetting Derivative Instruments | (29,434) | (14,121)
Financial Collateral Received/Pledged | (38,231) | (8,766)
Net Amounts | 0 | 0
Energy Services | Foreign currency contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 36 | 44
Offsetting Derivative Instruments | (30) | 0
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 6 | 44
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 30 |
Offsetting Derivative Instruments | (30) |
Financial Collateral Received/Pledged | 0 |
Net Amounts | 0 |
Natural Gas Distribution |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 487 | 151
Offsetting Derivative Instruments | (25) | (20)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 462 | 131
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 16,065 | 9,688
Offsetting Derivative Instruments | (25) | (20)
Financial Collateral Received/Pledged | (3,478) | (1,149)
Net Amounts | 12,562 | 8,519
Natural Gas Distribution | Physical commodity contracts |  |
Derivative assets: |  |
Amounts Presented in Balance Sheets | 487 | 151
Offsetting Derivative Instruments | (25) | (20)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 462 | 131
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 53 | 72
Offsetting Derivative Instruments | (25) | (20)
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | 28 | 52
Natural Gas Distribution | Financial commodity contracts |  |
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 3,478 | 1,149
Offsetting Derivative Instruments | 0 | 0
Financial Collateral Received/Pledged | (3,478) | (1,149)
Net Amounts | 0 | 0
Natural Gas Distribution | Interest rate contracts |  |
Derivative liabilities: |  |
Amounts Presented in Balance Sheets | 12,534 | 8,467
Offsetting Derivative Instruments | 0 | 0
Financial Collateral Received/Pledged | 0 | 0
Net Amounts | $ 12,534 | $ 8,467

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