Intangible Assets and Goodwill (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, amortization expense	$ 1,000,000	$ 700,000	$ 2,300,000	$ 1,400,000
Goodwill impairment loss			$ 0