Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Consolidated Statements of Comprehensive Income
Revenue	$ 364,936	$ 359,036	$ 1,090,038	$ 1,050,742
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)	$ 286,925	$ 275,548	$ 844,555	$ 797,450
Selling, general and administrative	43,321	45,167	134,611	132,372
Depreciation and amortization	17,317	16,515	52,052	47,273
Restructuring charges, net	2,716	6,006	4,599	9,768
Impairment losses			1,120
Total operating expenses	350,279	343,236	1,036,937	986,863
Income from operations	14,657	15,800	53,101	63,879
Other income (expense)
Interest income	1,401	899	3,940	2,020
Interest expense	(8,410)	(3,469)	(22,634)	(8,699)
Other income (expense), net	989	4,416	(8,786)	6,573
Non-cash loss on assets held-for-sale			(2,000)	(3,178)
Total other income (expense)	(6,020)	1,846	(29,480)	(3,284)
Income before income taxes	8,637	17,646	23,621	60,595
Benefit from (provision for) income taxes	(1,893)	(2,071)	(4,648)	(9,059)
Net income	6,744	15,575	18,973	51,536
Net income attributable to noncontrolling interest	(1,369)	(806)	(3,489)	(2,828)
Net income (loss) attributable to TTEC stockholders	5,375	14,769	15,484	48,708
Other comprehensive income (loss)
Foreign currency translation adjustments	(2,255)	(1,153)	(28,139)	8,414
Derivative valuation, gross	7,463	3,221	6,679	24,713
Derivative valuation, tax effect	(2,015)	(1,288)	(2,744)	(10,117)
Other, net of tax	103	127	317	386
Total other comprehensive income (loss)	3,296	907	(23,887)	23,396
Total comprehensive income (loss)	10,040	16,482	(4,914)	74,932
Less: Comprehensive income attributable to noncontrolling interest	(1,313)	(899)	(3,271)	(3,153)
Comprehensive income attributable to TTEC stockholders	$ 8,727	$ 15,583	$ (8,185)	$ 71,779
Weighted average shares outstanding
Basic	46,172	45,838	46,021	45,816
Diluted	46,316	46,367	46,390	46,348
Net income per share attributable to TTEC stockholders
Basic	$ 0.12	$ 0.32	$ 0.34	$ 1.06
Diluted	0.12	0.32	0.33	1.05
Dividends declared per share outstanding	$ 0.28	$ 0.25	$ 0.55	$ 0.47