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IMPAIRMENT OF ASSETS (NARRATIVE) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impaired Long-Lived Assets Held and Used, Asset Description |  |  | Assumptions included the amount and timing of estimated future cash flows and assumed discount rates. |
Impaired Long-Lived Assets Held and Used, Method for Determining Fair Value |  |  | The amount of impairment recognized is the difference between the carrying value of the asset group and its fair value. To determine fair value, the Company used Level 3 inputs in its discounted cash flows analysis. |
Asset Impairment Charges | $ 441 | $ 4,688 | $ 1,966 | $ 241,544
TTEC Digital | Leasehold Improvements Right of Use Lease Assets Capitalized Software Certain Computer Equipment [Member] |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Asset Impairment Charges | 0 | 400 | 200 | 2,900
TTEC Engage | Leasehold Improvements Right of Use Lease Assets Capitalized Software Certain Computer Equipment [Member] |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Asset Impairment Charges | $ 400 | $ 4,300 | $ 1,700 | $ 5,100

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