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FAIR VALUE (NARRATIVE) (Details)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2022
USD ($)
Apr. 30, 2021
USD ($)
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Apr. 01, 2022
USD ($)
Mar. 31, 2022
USD ($)
Nov. 04, 2020
Business acquisitions, Contingent Consideration [Line Items]                          
Line of credit     $ 960,000   $ 791,000       $ 960,000 $ 791,000      
Average interest rate on annual borrowings                 3.10% 1.30%      
Business Combination Contingent Consideration Liability     5,916   9,600     $ 18,032 $ 5,916 $ 9,600      
Contingent Consideration Receivable Imputed Interest Benefit and Other Adjustments                 (4,646)        
VoiceFoundry US                          
Business acquisitions, Contingent Consideration [Line Items]                          
Business Combination Contingent Consideration Liability     $ 0   7,414     14,085 $ 0 7,414      
Increase (decrease) in contingent consideration payable $ (7,400) $ (7,400)     (25) $ (200) $ (500) 3,200          
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     3,947 $ 0 2,186      
Increase (decrease) in contingent consideration payable $ (2,200) $ (2,200)     (100) 100 (400) 1,200          
VoiceFoundry ASEAN | Discount Rate                          
Business acquisitions, Contingent Consideration [Line Items]                          
Business combination contingent consideration measurement input     18.4           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     $ 5,916   $ 0       $ 5,916 $ 0 $ 8,800    
Increase (decrease) in contingent consideration payable     $ 500 $ 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     $ (200) $ (4,400)         $ (4,646)