Accounting Policies and Basis of Presentation (Details) (USD $)	3 Months Ended		9 Months Ended			1 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	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	Sep. 28, 2013 Bakery business
Equity method investments
Percentage ownership acquired										50.00%
Ownership after increase (as a percent)						70.00%			85.00%
Total cash paid, net of cash acquired				$ 2,825,000		$ 2,825,000	$ 515,000	$ 2,825,000
Increase in working capital								14,419,000
Increase in fixed assets								163,000
Increase in goodwill	43,218,000		43,218,000		43,218,000			2,590,000
Increase in intangible assets							515,000	621,000
Increase in other long-term assets								96,000
Increase in non-controlling interest								5,649,000
Decrease in investment in and advances to affiliates								9,415,000
Percentage of ownership											50.00%
Decrease in investments in and advances to affiliates											26,290,000
Increase in long-term notes receivable from affiliates											26,290,000
Non-cash, pay-in-kind interest income and accretion of discount recognized on a note receivable from an affiliate	$ 3,397,000	$ 2,989,000	$ 9,828,000	$ 8,747,000