Business Combinations (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012	Nov. 30, 2012	May 24, 2013 Rollbase [Member]	Aug. 31, 2013 Rollbase [Member]	Aug. 31, 2013 Rollbase [Member]
Business Acquisition [Line Items]
Equity interests in Rollbase, Inc.						100.00%
Total purchase consideration						$ 9,900,000
Purchase consideration, cash						9,500,000
Purchase consideration, contingent consideration						400,000
Expected payout period						2 years
Earn-out provision						5,000,000
Expense recognized related to contingent earn-out provisions							1,000,000	1,000,000
Goodwill	224,290,000		224,290,000		226,110,000	4,798,000
Acquisition-related expenses	957,000	0	2,229,000	215,000
Termination fee related to pre-existing license arrangement						$ 1,000,000