Business Segments and International Operations (Revenue from External Customers from Different Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Nov. 30, 2014	Aug. 31, 2014	May 31, 2014	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Revenue from External Customer [Line Items]
Total revenue	$ 97,894	$ 79,274	$ 80,827	$ 74,538	$ 90,980	$ 77,578	$ 81,705	$ 83,733	$ 332,533	$ 333,996	$ 317,612
United States [Member]
Revenue from External Customer [Line Items]
Total revenue									137,105	140,020	127,841
Canada [Member]
Revenue from External Customer [Line Items]
Total revenue									13,611	14,259	14,818
EMEA [Member]
Revenue from External Customer [Line Items]
Total revenue									131,335	133,600	125,566
Latin America [Member]
Revenue from External Customer [Line Items]
Total revenue									24,917	25,370	28,335
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue									$ 25,565	$ 20,747	$ 21,052