Gains and Losses on the Sale of Property, Plant and Equipment (detail) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 27, 2015	Dec. 27, 2014	Sep. 27, 2014	Dec. 26, 2015	Dec. 27, 2014
Property Plant And Equipment [Abstract]
Gain (Loss) on Disposition of Assets				$ 43,000	$ 89,000
Environmental Remediation Expense	$ 82,000		$ 250,000
Restructuring Cost and Reserve [Line Items]
Prop 65 Litigation	$ 200,000
Relationship Transfer Agreement				$ 24,275,000
Midwest Plant [Member]
Restructuring Cost and Reserve [Line Items]
Gain From Plant Closing		$ 5,000,000