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Segment Information (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |  | 1 Months Ended |  | 3 Months Ended |  | 3 Months Ended | 6 Months Ended |  | 3 Months Ended |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 02, 2011 | Jul. 02, 2011 | Jun. 30, 2012 | Dec. 31, 2011 | Jan. 28, 2012 PS International North Carolina | Apr. 03, 2010 PS International North Carolina | Oct. 01, 2011 Butterball, LLC Term loan | Jun. 30, 2012 Butterball, LLC Term loan | Jun. 30, 2012 Butterball, LLC Long-term note receivable | Apr. 02, 2011 Commodity Trading and Milling | Jun. 30, 2012 Power MW | Jun. 30, 2012 Power EDM | Apr. 20, 2011 Power EDM MW facility | Jul. 02, 2011 Power EDN and EDM | Apr. 08, 2011 Power EDN and EDM facility | Jun. 30, 2012 Turkey Butterball, LLC | Jul. 02, 2011 Turkey Butterball, LLC | Jun. 30, 2012 Turkey Butterball, LLC | Jul. 02, 2011 Turkey Butterball, LLC | Dec. 31, 2011 Turkey Butterball, LLC
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment to increase ownership interest in affiliate |  |  |  |  | $ 3,660,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage ownership acquired |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership after increase (as a percent) |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 101,080,000 |  |  |  |  |  |  |  |  |  |
Number of floating power generating facilities sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Gain on sale of assets | 51,423,000 | 51,423,000 |  |  |  |  |  |  |  |  |  |  |  | 51,423,000 |  |  |  |  |  |
Number of floating power generating facilties leased |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Capacity of EDM leased (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  | 72 |  |  |  |  |  |  |
Portion of sales price remaining in escrow |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |
Capacity of floating power generating facility newly constructed (in megawatts) |  |  |  |  |  |  |  |  |  |  | 106 |  |  |  |  |  |  |  |  |
Total project costs capitalized to date |  |  |  |  |  |  |  |  |  |  | 136,000,000 |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 302,423,000 | 292,814,000 | 604,039,000 | 571,271,000 |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,767,000 | 9,233,000 | 41,132,000 | 14,906,000 |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 908,269,000 |  | 908,269,000 |  | 819,618,000
Notes receivable from affiliate |  |  | 116,096,000 | 110,903,000 |  |  |  | 9,645,000 | 106,451,000 |  |  |  |  |  |  |  |  |  |  |
Loan provided to affiliate |  |  |  |  |  |  | $ 13,037,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on loan provided (as a percent) |  |  |  |  |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |

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