Segment Information (Details) (USD $)	6 Months Ended				1 Months Ended	3 Months Ended		12 Months Ended		1 Months Ended		12 Months Ended		3 Months Ended											3 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2012	Jan. 28, 2012 PS International	Jun. 29, 2013 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	Jan. 02, 2012 PS International North Carolina	Oct. 01, 2011 Butterball, LLC Term loan	Jun. 29, 2013 Butterball, LLC Term loan	Jun. 29, 2013 Butterball, LLC Long-term note receivable	Dec. 31, 2012 Butterball, LLC Long-term note receivable	Mar. 30, 2013 Pork	Jun. 29, 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	Jun. 29, 2013 Turkey	Dec. 31, 2012 Turkey	Jun. 29, 2013 Turkey Butterball, LLC	Mar. 30, 2013 Turkey Butterball, LLC	Jun. 30, 2012 Turkey Butterball, LLC	Jun. 29, 2013 Turkey Butterball, LLC	Jun. 30, 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	515,000	2,825,000			3,045,000	2,825,000	3,186,000
Percentage ownership acquired									50.00%				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																									353,944,000		302,423,000	724,514,000	604,039,000
Operating income (loss)																									(2,417,000)		17,767,000	(4,520,000)	41,132,000
Proportionate share of impairment charges of fixed assets recognized in loss from affiliate																										(2,704,000)
Total assets																							1,030,452,000	871,945,000
Notes receivable from affiliate		128,090,000		202,931,000											9,030,000	119,060,000	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 with operations resumed																					1