Intangible Assets And Goodwill (Narrative) (Details) (USD $)	0 Months Ended	6 Months Ended	12 Months Ended					12 Months Ended
	May 24, 2013	Feb. 28, 2013 product_lines	Nov. 30, 2013 Segments	Nov. 30, 2012 Segments	Nov. 30, 2011	Nov. 30, 2013 Purchased Technology [Member]	May 31, 2013 Purchased Technology [Member]	Nov. 30, 2013 Customer-Related And Other [Member]	May 31, 2013 Customer-Related And Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible asset, amount							$ 7,800,000		$ 200,000
Intangible assets, weighted average amortization period			6 years			5 years 9 months 18 days		6 years 7 months 6 days
Acquired intangible assets, weighted average useful life	4 years 10 months 24 days
Intangible assets, amortization expense			2,100,000	1,500,000	2,500,000
Number of product lines divested		10
Number of reportable segments			1	2
Goodwill impairment loss			$ 0	$ 0	$ 0