Gains and Losses on the Sale of Property, Plant and Equipment (detail) (USD $)	6 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Jun. 28, 2014
Property Plant And Equipment [Abstract]
Gain (Loss) on Disposition of Assets	$ 56,000	$ 869,000
Accrual For Environmental Loss			$ 250,000