Balance Sheet Information-AR Allowance (Details 1A) (USD $)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Accounts, Notes, Loans and Financing Receivable
Balance, beginning of year	$ 8,274,000	$ 6,627,000	$ 5,717,000
Additions charged to costs and expenses	857,000	2,167,000	1,452,000
Allowance adjustment	1,272,000	0	0
Deductions/write-offs	(781,000)	(520,000)	(542,000)
Balance, end of year	$ 9,622,000	$ 8,274,000	$ 6,627,000