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GENERAL - Narrative (Details)
$ in Thousands
12 Months Ended
Nov. 14, 2022
USD ($)
Jun. 17, 2021
USD ($)
Aug. 18, 2020
USD ($)
Dec. 31, 2022
USD ($)
market
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Business Acquisition [Line Items]            
Number of main markets | market       2    
Goodwill       $ 1,617,118 $ 1,606,756 $ 1,503,252
Acquisition costs       48 1,761 1,720
2022 Acquisitions            
Business Acquisition [Line Items]            
Consideration transferred in acquisition $ 50,381          
Cash consideration 30,000          
Contingent consideration 24,000     $ 20,381    
Goodwill 28,039          
2022 Acquisitions | Core Technology            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination $ 12,470          
Estimated useful life 4 years          
2022 Acquisitions | Customer relationships            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination $ 9,058          
Estimated useful life 4 years          
2022 Acquisitions | Trademarks            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination $ 459          
Estimated useful life 3 years          
ContactEngine            
Business Acquisition [Line Items]            
Consideration transferred in acquisition   $ 94,897        
Goodwill   69,593        
ContactEngine | Core Technology            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination   $ 20,558        
Estimated useful life   5 years        
ContactEngine | Customer relationships            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination   $ 3,279        
Estimated useful life   6 years        
ContactEngine | Customer backlog            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination   $ 5,493        
Estimated useful life   2 years        
Series of Individually Immaterial Business Acquisitions            
Business Acquisition [Line Items]            
Consideration transferred in acquisition         59,317 50,686
Intangible assets acquired in a business combination         20,036 22,968
Goodwill         $ 38,590 $ 54,869
Percent of share capital acquired         70.10% 50.10%
Fair value of non-controlling interests           $ 24,985
Guardian Analytics, Inc.            
Business Acquisition [Line Items]            
Consideration transferred in acquisition     $ 113,921      
Goodwill     65,888      
Guardian Analytics, Inc. | Core Technology            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination     $ 38,341      
Estimated useful life     6 years      
Guardian Analytics, Inc. | Customer relationships            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination     $ 6,659      
Estimated useful life     8 years      
Guardian Analytics, Inc. | Customer backlog            
Business Acquisition [Line Items]            
Intangible assets acquired in a business combination     $ 1,028      
Estimated useful life     2 years