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Business Combinations - Purchase Price Allocation (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Oct. 04, 2013
Bright Pattern
Oct. 04, 2013
Bright Pattern
Customer Relationships
Oct. 04, 2013
Bright Pattern
Tradename and Trademarks
Oct. 04, 2013
Bright Pattern
Technology
Business Acquisition [Line Items]            
Acquired cash     $ 3,541      
Current assets, including $3,541 of acquired cash     3,651      
Goodwill 750,858 750,785 5,712      
Finite-lived intangibles       690 350 5,550
Total assets acquired     15,953      
Current liabilities     (1,101)      
Deferred tax liabilities     (2,537)      
Net assets acquired     12,315      
Less: noncontrolling interest     (5,665)      
Net assets acquired     $ 6,650