Restructuring (table) (detail) (USD $)	3 Months Ended			6 Months Ended				3 Months Ended		6 Months Ended	3 Months Ended
	Sep. 28, 2013	Jun. 29, 2013	Dec. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013 Employee Severance [Member]	Sep. 29, 2012 Employee Severance [Member]	Sep. 28, 2013 Other Restructuring [Member]	Jun. 29, 2013 Other Restructuring [Member]	Sep. 28, 2013 Other Restructuring [Member]	Sep. 28, 2013 Long Lived Asset Charges [Member]	Mar. 31, 2013 Long Lived Asset Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance		$ 1,501,000	$ 27,000	$ 1,501,000	$ 37,000	$ 20,000	$ 37,000		$ 307,000	$ 307,000		$ 1,174,000
Plant Restructuring	347,000	154,000	2,510,000	501,000				6,000	154,000		341,000
Cash payments/write offs				(308,000)	(10,000)	(5,000)	(10,000)			(303,000)
Balance	$ 1,694,000			$ 1,694,000	$ 27,000	$ 15,000	$ 27,000	$ 164,000		$ 164,000	$ 1,515,000	$ 1,174,000