Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Consolidated Statements of Comprehensive Income
Revenue.	$ 539,219	$ 432,213
Type of Revenue	us-gaap:ServiceMember	us-gaap:ServiceMember
Operating expenses
Cost of services (exclusive of depreciation and amortization presented separately below)	$ 388,660	$ 321,557
Selling, general and administrative	52,757	49,834
Depreciation and amortization	20,459	18,872
Restructuring charges, net	402	538
Impairment losses	3,517	696
Total operating expenses	465,795	391,497
Income from operations	73,424	40,716
Other income (expense)
Interest income	179	364
Interest expense	(1,802)	(9,592)
Other income (expense), net	(798)	3,396
Total other income (expense)	(2,421)	(5,832)
Income before income taxes	71,003	34,884
Benefit from (provision for) income taxes	(15,979)	(10,199)
Net income	55,024	24,685
Net income attributable to noncontrolling interest	(4,606)	(3,151)
Net income (loss) attributable to TTEC stockholders	50,418	21,534
Other comprehensive income (loss)
Foreign currency translation adjustments	(5,753)	(29,814)
Derivative valuation, gross	(3,665)	(10,549)
Derivative valuation, tax effect	951	2,746
Other, net of tax	36	127
Total other comprehensive income (loss)	(8,431)	(37,490)
Total comprehensive income (loss)	46,593	(12,805)
Less: Comprehensive income attributable to noncontrolling interest	(3,034)	(1,700)
Comprehensive income (loss) attributable to TTEC stockholders	$ 43,559	$ (14,505)
Weighted average shares outstanding
Basic	46,743	46,498
Diluted	47,355	46,813
Weighted Average Share Counts
Basic	$ 1.08	$ 0.46
Diluted	1.06	0.46
Common Stock, Dividends, Per Share, Declared	$ 0.43	$ 0.34