FAIR VALUE - HIERARCHY (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2014
|
Sep. 30, 2013
|
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
Assets | $ 47,452 | $ 56,088 | ||||||
Available for sale equity securities - energy industry | 11,200 | [1] | 11,700 | |||||
Liabilities | 76,415 | 42,848 | ||||||
Fair Value, Measurements, Recurring [Member]
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
Available for sale equity securities - energy industry | 11,218 | [1] | 11,716 | [1] | ||||
Other | 1,263 | [2] | 1,129 | [2] | ||||
Total assets at fair value | 59,933 | 68,933 | ||||||
Total liabilities at fair value | 76,415 | 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 | 5,832 | 11,823 | ||||||
Liabilities | 35,680 | 14,595 | ||||||
Fair Value, Measurements, Recurring [Member] | Financial Derivative Contracts - Natural Gas [Member]
|
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
Assets | 41,620 | 44,249 | ||||||
Liabilities | 40,451 | 28,248 | ||||||
Fair Value, Measurements, Recurring [Member] | Financial Derivative Contracts - Foreign Exchange [Member]
|
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
Assets | 0 | 16 | ||||||
Liabilities | 284 | 5 | ||||||
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member]
|
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
Available for sale equity securities - energy industry | 11,218 | [1] | 11,716 | [1] | ||||
Other | 1,263 | [2] | 1,129 | [2] | ||||
Total assets at fair value | 54,101 | 57,094 | ||||||
Total liabilities at fair value | 40,451 | 28,248 | ||||||
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets, (Level 1) [Member] | Physical Forward Commodity Contracts [Member]
|
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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 | 41,620 | 44,249 | ||||||
Liabilities | 40,451 | 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 | 5,832 | 11,839 | ||||||
Total liabilities at fair value | 35,964 | 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 | 5,832 | 11,823 | ||||||
Liabilities | 35,680 | 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 | 0 | 16 | ||||||
Liabilities | 284 | 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 | ||||||
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