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GOODWILL (GOODWILL ROLLFORWARD) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill [Line Items]
Beginning balance, goodwill	$ 363,502
Acquisitions / Adjustments Increase (Decrease)	375,679
Effect of Foreign Currency	(2,783)
Ending balance, goodwill	736,398
TTEC Digital
Goodwill [Line Items]
Beginning balance, goodwill	128,211
Acquisitions / Adjustments Increase (Decrease)	375,679
Effect of Foreign Currency	(1,925)
Ending balance, goodwill	501,965
TTEC Engage
Goodwill [Line Items]
Beginning balance, goodwill	235,291
Effect of Foreign Currency	(858)
Ending balance, goodwill	$ 234,433

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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