Consolidated Financial Statement Details (Details) (USD $)	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Other Current Liabilities [Abstract]
Accrued discounts and allowances	$ 45,300,000	$ 43,200,000
Other Income (Expense), Net [Abstract]
Gain on the sale of non-operating property	0	3,000,000	0
Interest income	573,000	906,000	847,000
Environmental expense, non-operating properties	(822,000)	(823,000)	(1,128,000)
Other	6,000	1,368,000	820,000
Other income, net	$ (243,000)	$ 4,451,000	$ 539,000