Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Consolidated Statements of Comprehensive Income
Revenue.	$ 534,085	$ 600,394	$ 1,110,723	$ 1,233,680
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)	$ 417,890	$ 464,686	$ 871,708	$ 947,364
Selling, general and administrative	73,726	75,338	148,301	149,348
Depreciation and amortization	25,071	24,946	50,216	50,773
Restructuring charges, net	5,095	1,474	5,344	3,527
Impairment losses	236,716	2,652	236,856	6,959
Total operating expenses	758,498	569,096	1,312,425	1,157,971
Income from operations	(224,413)	31,298	(201,702)	75,709
Other income (expense)
Interest income	414	1,126	1,397	2,290
Interest expense	(20,431)	(18,991)	(41,502)	(36,382)
Other income (expense), net	1,788	(3,574)	1,994	(2,919)
Total other income (expense)	(18,229)	(21,439)	(38,111)	(37,011)
Income before income taxes	(242,642)	9,859	(239,813)	38,698
Benefit from (provision for) income taxes	(54,126)	(6,102)	(56,455)	(14,024)
Net income	(296,768)	3,757	(296,268)	24,674
Net income attributable to noncontrolling interest	(2,771)	(2,546)	(5,576)	(4,816)
Net income (loss) attributable to TTEC stockholders	(299,539)	1,211	(301,844)	19,858
Other comprehensive income (loss)
Foreign currency translation adjustments	(7,381)	19,367	(11,218)	28,765
Derivative valuation, gross	(8,854)	712	(9,164)	9,573
Derivative valuation, tax effect	2,304	(187)	2,379	(2,497)
Other, net of tax	91	108	212	180
Total other comprehensive income (loss)	(13,840)	20,000	(17,791)	36,021
Total comprehensive income (loss)	(310,608)	23,757	(314,059)	60,695
Less: Comprehensive income attributable to noncontrolling interest	(2,779)	(2,560)	(5,490)	(4,385)
Comprehensive income (loss) attributable to TTEC stockholders	$ (313,387)	$ 21,197	$ (319,549)	$ 56,310
Weighted average shares outstanding
Basic	47,564	47,264	47,498	47,249
Diluted	47,623	47,453	47,585	47,417
Net income (loss) per share attributable to TTEC stockholders
Basic	$ (6.30)	$ 0.03	$ (6.35)	$ 0.42
Diluted	$ (6.29)	$ 0.03	$ (6.34)	$ 0.42