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FAIR VALUE - HIERARCHY (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Sep. 30, 2013
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | $ 36,774 |  | $ 56,088 |
Available for sale equity securities - energy industry | 11,192 | [1] | 11,716 |
Liabilities | 83,982 |  | 42,848 |
Fair Value, Measurements, Recurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available for sale equity securities - energy industry | 11,192 | [1] | 11,716 | [1]
Other | 1,442 | [2] | 1,129 | [2]
Total assets at fair value | 49,408 |  | 68,933 |
Total liabilities at fair value | 83,982 |  | 42,848 |
Fair Value, Measurements, Recurring [Member] | Physical Forward Commodity Contracts [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 9,056 |  | 11,823 |
Liabilities | 29,416 |  | 14,595 |
Fair Value, Measurements, Recurring [Member] | Financial Derivative Contracts - Natural Gas [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 27,716 |  | 44,249 |
Liabilities | 54,521 |  | 28,248 |
Fair Value, Measurements, Recurring [Member] | Financial Derivative Contracts - Foreign Exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 2 |  | 16 |
Liabilities | 45 |  | 5 |
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 equity securities - energy industry | 11,192 | [1] | 11,716 | [1]
Other | 1,442 | [2] | 1,129 | [2]
Total assets at fair value | 40,350 |  | 57,094 |
Total liabilities at fair value | 54,521 |  | 28,248 |
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] |  |  |  |
Assets | 0 |  | 0 |
Liabilities | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] | Financial Derivative Contracts - Natural Gas [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 27,716 |  | 44,249 |
Liabilities | 54,521 |  | 28,248 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] | Financial Derivative Contracts - Foreign Exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 0 |  | 0 |
Liabilities | 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 equity securities - energy industry | 0 | [1] | 0 | [1]
Other | 0 | [2] | 0 | [2]
Total assets at fair value | 9,058 |  | 11,839 |
Total liabilities at fair value | 29,461 |  | 14,600 |
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] |  |  |  |
Assets | 9,056 |  | 11,823 |
Liabilities | 29,416 |  | 14,595 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Financial Derivative Contracts - Natural Gas [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 0 |  | 0 |
Liabilities | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Financial Derivative Contracts - Foreign Exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 2 |  | 16 |
Liabilities | 45 |  | 5 |
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 equity securities - energy industry | 0 | [1] | 0 | [1]
Other | 0 | [2] | 0 | [2]
Total assets at fair value | 0 |  | 0 |
Total liabilities at fair value | 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] |  |  |  |
Assets | 0 |  | 0 |
Liabilities | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Financial Derivative Contracts - Natural Gas [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 0 |  | 0 |
Liabilities | 0 |  | 0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Financial Derivative Contracts - Foreign Exchange [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets | 0 |  | 0 |
Liabilities | $ 0 |  | $ 0 |
[1] | Included in Other noncurrent assets on the Unaudited Condensed Consolidated Balance Sheets
[2] | Includes various money market funds.

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