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Business Combinations (Schedule of Net Assets Acquired) (Details) - USD ($)
$ in Thousands
Dec. 02, 2014
Feb. 29, 2016
Nov. 30, 2015
Business Acquisition [Line Items]      
Goodwill   $ 369,964 $ 369,985
Telerik AD [Member]      
Business Acquisition [Line Items]      
Net working capital $ 8,222    
Property, plant and equipment 3,078    
Intangible assets 123,100    
Deferred taxes (9,272)    
Deferred revenue (7,915)    
Other non-current liabilities (2,732)    
Goodwill 137,472    
Net assets acquired $ 251,953    
Acquired intangible assets, useful life 5 years