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Segment Information (Details) (USD $) | 12 Months Ended | 3 Months Ended |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  | 3 Months Ended | 12 Months Ended |  | 3 Months Ended |  | 1 Months Ended | 3 Months Ended |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 segment | Dec. 31, 2010 | Dec. 31, 2009 | Oct. 01, 2011 Pork Mexico ham boning and processing plant | Dec. 31, 2011 Pork Revenues Agent Japan | Dec. 31, 2011 Commodity Trading and Milling Y | Dec. 31, 2011 Commodity Trading and Milling | Apr. 02, 2011 Commodity Trading and Milling | Dec. 31, 2011 Commodity Trading and Milling | Dec. 31, 2010 Commodity Trading and Milling | Dec. 31, 2009 Commodity Trading and Milling | Oct. 02, 2010 Commodity Trading and Milling | Jul. 04, 2009 Sugar | Apr. 04, 2009 Sugar | Dec. 31, 2011 Sugar | Dec. 31, 2010 Sugar | Dec. 31, 2009 Sugar | Dec. 31, 2011 Power MW | Jul. 02, 2011 Power EDN | Apr. 20, 2011 Power EDM MW | Apr. 30, 2011 Power EDN and EDM | Apr. 04, 2009 Power EDN and EDM | Oct. 01, 2011 Power EDN and EDM | Jul. 02, 2011 Power EDN and EDM | Apr. 08, 2011 Power EDN and EDM facility | Dec. 31, 2011 Turkey | Dec. 31, 2011 Turkey | Dec. 31, 2010 Turkey
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of revenues |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of agents |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charge | $ 5,600,000 |  |  | $ 5,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  | 101,080,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory write-downs |  |  |  |  |  |  |  |  | 15,374,000 |  | 8,801,000 |  |  | 2,803,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventory write-downs (in dollars per share) |  |  |  |  |  |  |  |  | $ 12.65 |  | $ 7.10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportionate share of income from affiliates | 26,621,000 | 20,965,000 | 20,158,000 |  |  |  | 5,080,000 |  | 13,450,000 | 20,983,000 | 19,128,000 |  |  |  | 440,000 | 980,000 | 1,030,000 |  |  |  |  |  |  |  |  |  | 12,731,000 | (998,000)
Proportionate share of impairment of fixed assets charge and accrued severance charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,005,000) |  |
Advance capital lease payment to begin operations in 2012 of a flour mill in Ghana | 8,493,000 |  |  |  |  | 8,493,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial lease term (in years) |  |  |  |  |  | 33 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in fixed assets due to capital lease |  |  |  |  |  | 9,763,000 | 9,763,000 |  | 9,763,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in liabilities due to capital lease |  |  |  |  |  |  |  |  | 1,270,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration for majority interest acquired in commodity origination, storage and processing business in Canada |  |  |  |  |  |  |  |  |  |  |  | 6,747,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash acquired |  |  |  |  |  |  |  |  |  |  |  | 1,169,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional charge incurred to earnings in connection with change in business |  |  |  |  |  |  |  |  |  |  |  |  | 2,497,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of floating power generating facilities sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |
Consideration for sale of floating power generating facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73,102,000 |  |  |
Amount received by the entity on sale of floating power generating facilities | 59,603,000 |  | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000,000 |  |  |  |  |  |
Amount received by the entity on sale of floating power generating facilities from previously escrowed balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 | 55,000,000 |  |  |  |
Amount placed in escrow for potential dry dock costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |
Escrow earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,796,000 |  |  |  |
Amount received by the entity on sale of floating power generating facilities from various inventory items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,306,000 |  |  |  |  |  |  |  |  |
Gain on sale of assets | 52,923,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 | 51,423,000 |  |  |  |
Net book value of power generating facilities and certain inventory items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,679,000 |  |  |
Capacity of EDM leased (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 72 |  |  |  |  |  |  |  |
Capacity of floating power generating facility newly constructed (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106 |  |  |  |  |  |  |  |  |  |
Approximate construction cost of new floating power generating facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 133,000,000 |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 55,164,000 | $ (169,000)

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