Segment Reporting - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Dec. 28, 2013 Segment	Sep. 27, 2014 Segment	Sep. 27, 2014 Customer Concentration Risk [Member] Walmart [Member] Sales [Member]	Sep. 28, 2013 Customer Concentration Risk [Member] Walmart [Member] Sales [Member]	Sep. 27, 2014 Customer Concentration Risk [Member] Walmart [Member] Sales [Member] All Other [Member]	Sep. 28, 2013 Customer Concentration Risk [Member] Walmart [Member] Sales [Member] All Other [Member]	Sep. 27, 2014 Customer Concentration Risk [Member] Walmart [Member] Sales [Member] North America [Member]	Sep. 28, 2013 Customer Concentration Risk [Member] Walmart [Member] Sales [Member] North America [Member]	Sep. 27, 2014 Customer Concentration Risk [Member] Walmart [Member] Sales [Member] United Kingdom [Member]	Sep. 28, 2013 Customer Concentration Risk [Member] Walmart [Member] Sales [Member] United Kingdom [Member]
Revenue, Major Customer [Line Items]
Number of reporting segments		3
Number of combined reporting segments	1
Concentration risk			26.30%	29.90%	3.10%	4.30%	33.00%	35.90%	12.90%	14.10%