Accounts Payable and Accrued Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Dec. 01, 2012	Dec. 03, 2011
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Warranty accrual at beginning of period	$ 1,533	$ 2,580	$ 3,499
Accruals for warranties issued during the period	844	514	622
Adjustments related to business acquisitions	0	32	0
Adjustments related to pre-existing warranties	(290)	(691)	(846)
Settlements made during the period	(500)	(850)	(316)
Other adjustments, including currency translation	12	(52)	(379)
Warranty accrual at end of period	$ 1,599	$ 1,533	$ 2,580