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