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FAIR VALUE - HIERARCHY (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Sep. 30, 2012
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | $ 46,021 |  | $ 50,349 |
Fair value, assets, Level 2 to Level 1 transfers, amount | 19,564 |  |  |
Fair value, liabilities, Level 2 to Level 1 transfers, amount | (8,766) |  |  |
Fair value, total, Level 2 to Level 1 transfers, amount | 10,798 |  |  |
Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 10,469 | [1] | 11,009 | [1]
Other assets, fair value disclosure | 211 | [2] | 30 | [2]
Assets fair value disclosure total | 56,701 |  | 61,388 |
Other liabilities fair value disclosure | 0 |  | 0 |
Liabilities fair value disclosure | 24,360 |  | 45,573 |
Fair Value, Measurements, Recurring [Member] | Physical Forward Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 13,500 |  | 20,248 |
Derivative liabilities, fair value disclosure | 10,450 |  | 9,746 |
Fair Value, Measurements, Recurring [Member] | Financial Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 32,393 |  | 29,915 |
Derivative liabilities, fair value disclosure | 13,839 |  | 35,715 |
Fair Value, Measurements, Recurring [Member] | Financial commodity contracts - foreign exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 128 |  | 186 |
Derivative liabilities, fair value disclosure | 71 |  | 112 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 10,469 | [1] | 11,009 | [1]
Other assets, fair value disclosure | 211 | [2] | 30 | [2]
Assets fair value disclosure total | 42,872 |  | 25,309 |
Other liabilities fair value disclosure | 0 |  | 0 |
Liabilities fair value disclosure | 13,175 |  | 16,922 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] | Physical Forward Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 0 |  | 0 |
Derivative liabilities, fair value disclosure | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] | Financial Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 32,192 |  | 14,270 |
Derivative liabilities, fair value disclosure | 13,175 |  | 16,922 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] | Financial commodity contracts - foreign exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 0 |  | 0 |
Derivative liabilities, fair value disclosure | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 0 | [1] | 0 | [1]
Other assets, fair value disclosure | 0 | [2] | 0 | [2]
Assets fair value disclosure total | 13,829 |  | 36,079 |
Other liabilities fair value disclosure | 0 |  | 0 |
Liabilities fair value disclosure | 11,185 |  | 28,651 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Physical Forward Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 13,500 |  | 20,248 |
Derivative liabilities, fair value disclosure | 10,450 |  | 9,746 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Financial Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 201 |  | 15,645 |
Derivative liabilities, fair value disclosure | 664 |  | 18,793 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Financial commodity contracts - foreign exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 128 |  | 186 |
Derivative liabilities, fair value disclosure | 71 |  | 112 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 0 | [1] | 0 | [1]
Other assets, fair value disclosure | 0 | [2] | 0 | [2]
Assets fair value disclosure total | 0 |  | 0 |
Other liabilities fair value disclosure | 0 |  | 0 |
Liabilities fair value disclosure | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Physical Forward Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 0 |  | 0 |
Derivative liabilities, fair value disclosure | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Financial Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 0 |  | 0 |
Derivative liabilities, fair value disclosure | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Financial commodity contracts - foreign exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative assets, fair value disclosure | 0 |  | 0 |
Derivative liabilities, fair value disclosure | $ 0 |  | $ 0 |
[1] | (1)Included in Other noncurrent assets on the Unaudited Condensed Consolidated Balance Sheets
[2] | Includes various money market funds.

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