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Fair Value Disclosures (Schedule Of Assets And Liabilities Fair Value) (Details) (USD $)
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Mar. 31, 2014
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Dec. 31, 2013
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||
| Debt instrument amount | $ 22,000,000 | |||||
| Assets | ||||||
| Cash and cash equivalents | 207,034,000 | 272,027,000 | ||||
| Restricted cash | 22,893,000 | 26,994,000 | ||||
| Inventories carried at market | 24,959,000 | 23,782,000 | ||||
| Unrealized gains on derivatives | 37,221,000 | 48,636,000 | ||||
| Other assets | 2,319,000 | [1] | 2,200,000 | [1] | ||
| Total assets measured at fair value | 294,426,000 | 373,639,000 | ||||
| Liabilities | ||||||
| Unrealized losses on derivatives | 37,793,000 | 4,612,000 | ||||
| Other | 25,000 | 9,000 | ||||
| Total liabilities measured at fair value | 37,818,000 | 4,621,000 | ||||
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Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
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| Assets | ||||||
| Cash and cash equivalents | 207,034,000 | 272,027,000 | ||||
| Restricted cash | 22,893,000 | 26,994,000 | ||||
| Margin deposits | 130,425,000 | 77,102,000 | ||||
| Unrealized gains on derivatives | 58,091,000 | 3,629,000 | ||||
| Other assets | 2,319,000 | [1] | 2,200,000 | [1] | ||
| Total assets measured at fair value | 420,762,000 | 381,952,000 | ||||
| Liabilities | ||||||
| Unrealized losses on derivatives | 162,078,000 | 50,807,000 | ||||
| Other | 25,000 | 9,000 | ||||
| Total liabilities measured at fair value | 162,103,000 | 50,816,000 | ||||
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Significant Other Observable Inputs (Level 2) [Member]
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| Assets | ||||||
| Inventories carried at market | 24,959,000 | 23,782,000 | ||||
| Unrealized gains on derivatives | 10,783,000 | 18,712,000 | ||||
| Total assets measured at fair value | 35,742,000 | 42,494,000 | ||||
| Liabilities | ||||||
| Unrealized losses on derivatives | 37,793,000 | 4,612,000 | ||||
| Total liabilities measured at fair value | 37,793,000 | 4,612,000 | ||||
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Reclassification For Balance Sheet Presentation [Member]
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| Assets | ||||||
| Margin deposits | (130,425,000) | (77,102,000) | ||||
| Unrealized gains on derivatives | (31,653,000) | 26,295,000 | ||||
| Total assets measured at fair value | (162,078,000) | (50,807,000) | ||||
| Liabilities | ||||||
| Unrealized losses on derivatives | (162,078,000) | (50,807,000) | ||||
| Total liabilities measured at fair value | (162,078,000) | (50,807,000) | ||||
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Green Plains Bluffton [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||
| Debt instrument amount | $ 22,000,000 | |||||
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