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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Jun. 24, 2018
Operating Loss Carryforwards [Line Items]        
Tax credit carryforward $ 28,900      
Significant change in shareholder ownership, period of change 3 years      
Significant change in shareholder ownership, benchmark percentage 50.00%      
Deferred tax assets, valuation allowance $ 488,550 $ 471,515    
Unrecognized tax benefits, income tax penalties and interest accrued 14,900 21,000 $ 15,300  
Unrecognized tax benefits that would impact effective tax rate 11,200 12,700 13,900  
Unrecognized tax benefits, income tax penalties and interest expense (300) 1,900 $ 500  
Accrued expenses and other        
Operating Loss Carryforwards [Line Items]        
Unrecognized tax benefits, income tax penalties and interest accrued 2,900 3,200    
Edgewater        
Operating Loss Carryforwards [Line Items]        
Net operating loss carryforwards acquired       $ 112,300
Annual limitation 9,700      
ECI        
Operating Loss Carryforwards [Line Items]        
Net operating loss carryforwards acquired       $ 41,900
Annual limitation 1,100      
Domestic Tax Authority        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 152,500      
Deferred tax assets, valuation allowance 25,500 30,500    
State and Local Jurisdiction        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 18,800      
Israel        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 1,600,000      
Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Deferred tax assets, valuation allowance $ 463,000 $ 441,000