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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

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