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FAIR VALUE (NARRATIVE) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Apr. 01, 2022
USD ($)
Mar. 31, 2022
USD ($)
Business acquisitions, Contingent Consideration [Line Items]                
Line of credit   $ 930,000 $ 791,000          
Average interest rate on annual borrowings   2.00%            
Business Combination Contingent Consideration Liability     9,600          
CafeX Member                
Business acquisitions, Contingent Consideration [Line Items]                
Impairment of equity investment $ 15,600              
VoiceFoundry US                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination Contingent Consideration Liability   $ 0 7,414          
VoiceFoundry US | Discount Rate                
Business acquisitions, Contingent Consideration [Line Items]                
Business combination contingent consideration measurement input   23.1            
VoiceFoundry ASEAN                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination Contingent Consideration Liability   $ 0 2,186          
VoiceFoundry ASEAN | Discount Rate                
Business acquisitions, Contingent Consideration [Line Items]                
Business combination contingent consideration measurement input   18.4            
VoiceFoundry Acquisitions                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination Contingent Consideration Liability               $ 9,600
Increase (decrease) in contingent consideration payable     $ 100 $ 200 $ 900 $ 4,300    
Faneuil                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination Contingent Consideration Liability   $ 8,816         $ 8,800  
Faneuil | Discount Rate                
Business acquisitions, Contingent Consideration [Line Items]                
Business combination contingent consideration measurement input   19.3            
Faneuil receivable [Member]                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination, Acquired Receivable, Fair Value   $ 10,400