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FAIR VALUE (NARRATIVE) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2022
USD ($)
Apr. 01, 2022
USD ($)
Mar. 31, 2022
USD ($)
Business acquisitions, Contingent Consideration [Line Items]                
Line of credit $ 955,000 $ 791,000       $ 955,000    
Average interest rate on annual borrowings 3.50%              
Business Combination Contingent Consideration Liability $ 6,439 9,600       6,439    
Contingent Consideration Receivable Imputed Interest Benefit and Other Adjustments           (4,447)    
Increase (decrease) in contingent consideration payable 2,400              
VoiceFoundry US                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination Contingent Consideration Liability $ 0 7,414       $ 0    
VoiceFoundry US | Discount Rate                
Business acquisitions, Contingent Consideration [Line Items]                
Business combination contingent consideration measurement input 23.1         23.1    
VoiceFoundry ASEAN                
Business acquisitions, Contingent Consideration [Line Items]                
Business Combination Contingent Consideration Liability $ 0 2,186       $ 0    
VoiceFoundry ASEAN | Discount Rate                
Business acquisitions, Contingent Consideration [Line Items]                
Business combination contingent consideration measurement input 18.4         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 $ 6,439         $ 6,439 $ 8,800  
Increase (decrease) in contingent consideration payable $ 2,400              
Faneuil | Discount Rate                
Business acquisitions, Contingent Consideration [Line Items]                
Business combination contingent consideration measurement input 19.3         19.3    
Faneuil receivable [Member]                
Business acquisitions, Contingent Consideration [Line Items]                
Contingent Consideration Receivable Imputed Interest Benefit and Other Adjustments $ (4,400)         $ (4,447)