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FAIR VALUE (NARRATIVE) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Business acquisitions, Contingent Consideration [Line Items]          
Line of credit $ 803,000 $ 791,000      
Average interest rate on annual borrowings 1.30%        
Business Combination Contingent Consideration Liability $ 0 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