Restructuring (Details) - USD ($)	3 Months Ended
	Feb. 27, 2016	Feb. 28, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 759,000	$ 0
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	726,000
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	33,000
Accrued Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 2,537,000