Restructuring (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 28, 2016	May 30, 2015	May 28, 2016	May 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,382,000	$ 0	$ 2,141,000	$ 0
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,175,000		1,901,000
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	207,000		240,000
Accrued Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1,794,000		$ 1,794,000