Contingent Liabilities (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended						3 Months Ended
	Jan. 27, 2012	Feb. 29, 2012	Nov. 30, 2011	Feb. 29, 2012 Bernz [Member]	Jul. 01, 2011 Bernz [Member]	Feb. 29, 2012 Product Returns [Member]	Nov. 30, 2011 Product Returns [Member]	Nov. 30, 2011 Recall-Related Costs [Member]	Feb. 29, 2012 Recall-Related Costs [Member]
Contingent Liabilities [Line Items]
Damages awarded to the plaintiff	$ 3,700,000
Loss related to litigation settlement		1,500,000
Amount paid to resolve preexisting relationship with seller					10,000,000
Reserves recognized prior to closing				14,402,000	14,402,000
Inventory write-down								1,051,000
Product warranty accrual		$ 7,031,000	$ 8,620,000			$ 3,983,000	$ 4,737,000	$ 3,883,000	$ 3,048,000