Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statements of Comprehensive Income
Revenue	$ 1,477,365	$ 1,275,258	$ 1,286,755
Operating expenses
Cost of services (exclusive of depreciation and amortization presented separately below)	1,110,068	941,592	928,247
Selling, general and administrative	182,314	175,797	194,606
Depreciation and amortization	64,507	68,675	63,808
Restructuring charges, net	14,665	4,392	1,814
Impairment losses	5,322	32,050	8,100
Total operating expenses	1,376,876	1,222,506	1,196,575
Income from operations	100,489	52,752	90,180
Other income (expense)
Interest income	2,841	1,234	1,090
Interest expense	(13,734)	(7,943)	(7,538)
Other income (expense), net	1,869	9,555	2,157
Loss on assets held-for-sale	(2,578)
Non-cash loss on assets held-for-sale	0	(5,300)	0
Total other income (expense)	(11,602)	(2,454)	(4,291)
Income before income taxes	88,887	50,298	85,889
Benefit from (provision for) income taxes	(78,075)	(12,863)	(20,004)
Net income	10,812	37,435	65,885
Net income attributable to noncontrolling interest	(3,556)	(3,757)	(4,219)
Net income (loss) attributable to TeleTech stockholders	7,256	33,678	61,666
Other comprehensive income (loss)
Foreign currency translation adjustments	8,285	(21,055)	(38,200)
Derivative valuation, gross	27,931	(7,838)	(15,768)
Derivative valuation, tax effect	(11,284)	2,330	7,228
Other, net of tax	105	721	(2,707)
Total other comprehensive income (loss)	25,037	(25,842)	(49,447)
Total comprehensive income (loss)	35,849	11,593	16,438
Less: Comprehensive income attributable to noncontrolling interest	(3,933)	(3,514)	(3,026)
Comprehensive income attributable to TeleTech stockholders	$ 31,916	$ 8,079	$ 13,412
Weighted average shares outstanding
Basic	45,826	47,423	48,370
Diluted	46,382	47,736	49,011
Net income per share attributable to TeleTech stockholders
Basic	$ 0.16	$ 0.71	$ 1.27
Diluted	$ 0.16	$ 0.71	$ 1.26