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Business Combinations (Narrative) (Details) (USD $)
0 Months Ended 3 Months Ended
Feb. 28, 2014
Nov. 30, 2013
May 24, 2013
Rollbase [Member]
Feb. 28, 2014
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       900,000
Goodwill $ 224,185,000 $ 224,286,000 $ 4,798,000