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BUSINESS ACQUISITIONS AND DIVESTITURE - WIL Research, Definite Lived Intangible Assets (Details) - WIL Research
$ in Thousands
Apr. 04, 2016
USD ($)
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 164,800
Weighted Average Amortization Life 13 years
Client relationships, net  
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 137,500
Weighted Average Amortization Life 15 years
Developed technology  
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 20,700
Weighted Average Amortization Life 3 years
Backlog  
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 6,600
Weighted Average Amortization Life 1 year