Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statements of Comprehensive Income
Revenue.	$ 492,980	$ 395,507	$ 1,378,274	$ 1,182,378
Type of Revenue	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Operating expenses
Cost of services (exclusive of depreciation and amortization presented separately below)	$ 368,405	$ 304,622	$ 1,027,268	$ 897,193
Selling, general and administrative	49,473	48,062	146,667	148,646
Depreciation and amortization	19,522	16,659	57,054	50,452
Restructuring charges, net	1,233	183	2,564	1,572
Impairment losses	948		1,644	3,569
Total operating expenses	439,581	369,526	1,235,197	1,101,432
Income from operations	53,399	25,981	143,077	80,946
Other income (expense)
Interest income	566	522	1,421	1,291
Interest expense	(2,755)	(4,041)	(15,451)	(13,537)
Other income (expense), net	(18,663)	2,713	(17,028)	5,376
Total other income (expense)	(20,852)	(806)	(31,058)	(6,870)
Income before income taxes	32,547	25,175	112,019	74,076
Benefit from (provision for) income taxes	(8,415)	(5,196)	(29,653)	(20,007)
Net income	24,132	19,979	82,366	54,069
Net income attributable to noncontrolling interest	(2,766)	(1,878)	(8,141)	(5,168)
Net income (loss) attributable to TTEC stockholders	21,366	18,101	74,225	48,901
Other comprehensive income (loss)
Foreign currency translation adjustments	28,679	(9,138)	9,845	(2,758)
Derivative valuation, gross	5,350	1,255	(98)	11,517
Derivative valuation, tax effect	(1,415)	(353)	14	(3,102)
Other, net of tax	130	37	376	54
Total other comprehensive income (loss)	32,744	(8,199)	10,137	5,711
Total comprehensive income (loss)	56,876	11,780	92,503	59,780
Less: Comprehensive income attributable to noncontrolling interest	(2,749)	(1,693)	(6,316)	(4,983)
Comprehensive income (loss) attributable to TTEC stockholders	$ 54,127	$ 10,087	$ 86,187	$ 54,797
Weighted average shares outstanding
Basic	46,732	46,481	46,617	46,335
Diluted	47,031	46,768	46,885	46,693
Weighted Average Share Counts
Basic	$ 0.46	$ 0.39	$ 1.59	$ 1.06
Diluted	0.45	0.39	1.58	1.05
Common Stock, Dividends, Per Share, Declared	$ 0.40	$ 0.32	$ 0.40	$ 0.32