Major Customers and Export Sales - Foreign Revenue, as Percentage of Total Foreign Revenue by Geographic Area (Detail)	3 Months Ended		6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013
Colombia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from foreign countries as a percentage of foreign revenue			89.00%
Saudi Arabia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from foreign countries as a percentage of foreign revenue	100.00%		11.00%	88.00%
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from foreign countries as a percentage of foreign revenue		100.00%		4.00%
Jordan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from foreign countries as a percentage of foreign revenue				8.00%