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Segment Information (Details) (USD $) | 3 Months Ended |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  | 1 Months Ended | 12 Months Ended | 3 Months Ended |  |  |  |  |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2012 | Mar. 30, 2013 | Dec. 31, 2012 | Jan. 28, 2012 PS International | Mar. 31, 2012 PS International | Dec. 31, 2012 PS International | Jan. 02, 2012 PS International | Dec. 31, 2012 PS International North Carolina | Jan. 28, 2012 PS International North Carolina | Dec. 31, 2012 PS International North Carolina item | Oct. 01, 2011 Butterball, LLC Term loan | Mar. 30, 2013 Butterball, LLC Term loan | Mar. 30, 2013 Butterball, LLC Long-term note receivable | Dec. 31, 2012 Butterball, LLC Long-term note receivable | Mar. 30, 2013 Pork | Mar. 30, 2013 Power Dominican Republic | Mar. 31, 2012 Power Dominican Republic MW | Apr. 20, 2011 Power Dominican Republic item MW | Apr. 08, 2011 Power Dominican Republic facility | Mar. 31, 2011 Power Dominican Republic item | Mar. 30, 2013 Turkey | Dec. 31, 2012 Turkey | Mar. 30, 2013 Turkey Butterball, LLC | Mar. 31, 2012 Turkey Butterball, LLC
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-time Federal blender's credits that will be recognized as revenues |  | $ 11,260,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,260,000 |  |  |  |  |  |  |  |  |
Total cash paid, net of cash acquired | 2,825,000 |  |  | 2,825,000 | 2,825,000 |  |  | 3,045,000 | 2,825,000 | 3,186,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage ownership acquired |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership after increase (as a percent) |  |  |  | 70.00% |  | 85.00% |  |  | 70.00% | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of transactions for acquiring interest in subsidiaries |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of floating power generating facilities sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Capacity of EDM leased (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 72 |  |  |  |  |  |
Capacity of floating power generating facility newly constructed (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106 |  |  |  |  |  |  |
Portion of sales price remaining in escrow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |
Total net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 370,570,000 | 301,616,000
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,103,000) | 23,365,000
Proportionate share of impairment charges of fixed assets recognized in loss from affiliate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,704,000) |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 981,149,000 | 871,945,000 |  |
Notes receivable from affiliate |  | 124,811,000 | 202,931,000 |  |  |  |  |  |  |  |  | 9,071,000 | 115,740,000 | 81,231,000 |  |  |  |  |  |  |  |  |  |
Loan provided to affiliate |  |  |  |  |  |  |  |  |  |  | $ 13,037,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on loan provided (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of floating power generating facilities leased |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Number of floating power generating facilities with operations resumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |

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