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%