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BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Definite-Lived Intangible Assets (Details) - MPI Research
$ in Thousands
Apr. 03, 2018
USD ($)
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 309,200
Weighted Average Amortization Life 12 years
Client relationships  
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 264,900
Weighted Average Amortization Life 13 years
Developed technology  
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 23,400
Weighted Average Amortization Life 3 years
Backlog  
Business Acquisition [Line Items]  
Definite-Lived Intangible Assets $ 20,900
Weighted Average Amortization Life 2 years