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BUSINESS COMBINATIONS (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 18, 2019
Jun. 30, 2019
Mar. 31, 2019
Allocation of Purchase Price Consideration to Assets Acquired and Liabilities Assumed [Abstract]      
Goodwill   $ 110,754 $ 110,807
SLAIT Consulting, LLC [Member]      
Business Combination [Abstract]      
Percentage of stock acquired 100.00%    
Cash portion of the acquisition $ 50,700    
Cash acquired from acquisition 1,000    
Liability from working capital adjustment 300    
Allocation of Purchase Price Consideration to Assets Acquired and Liabilities Assumed [Abstract]      
Accounts receivable 10,208    
Other assets 1,050    
Identified intangible assets 18,190    
Accounts payable and other current liabilities (8,669)    
Performance obligation (5,110)    
Total identifiable net assets 15,669    
Goodwill 34,352    
Total purchase consideration $ 50,021    
SLAIT Consulting, LLC [Member] | Customer Relationships [Member]      
Allocation of Purchase Price Consideration to Assets Acquired and Liabilities Assumed [Abstract]      
Estimated useful lives   10 years