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ACQUISITIONS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Business Acquisition [Line Items]      
Purchase price, net of cash acquired $ 49,037 $ 0  
Goodwill 1,111,342   $ 1,088,032
2019 acquisitions [Member]      
Business Acquisition [Line Items]      
Accounts receivable 2,300    
Inventory 322    
Property, plant, and equipment 648    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 180    
Intangible assets 26,000    
Right of Use Assets 1,410    
Current and non-current liabilities (2,970)    
Net tangible and intangible assets 27,890    
Goodwill 21,147    
Business Acquisition, Goodwill, Expected Tax Deductible Amount 21,147    
Defense [Member]      
Business Acquisition [Line Items]      
Goodwill 471,377   $ 448,871
Defense [Member] | Tactical Communications Group (TCG) [Member]      
Business Acquisition [Line Items]      
Purchase price, net of cash acquired $ 49,037