QUARTERLY FINANCIAL DATA (UNAUDITED) (QUARTERLY FINANCIALS TABLE) (DETAILS) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
QUARTERLY FINANCIAL DATA (UNAUDITED) [ABSTRACT]
Revenue	$ 338,170	$ 305,900	$ 295,490	$ 302,221	$ 318,087	$ 296,995	$ 289,692	$ 288,383	$ 1,241,781	$ 1,193,157	$ 1,162,981
Cost of services	(240,146)	(220,244)	(212,315)	(213,787)	(220,942)	(208,648)	(208,809)	(208,232)	(886,492)	(846,631)	(834,803)
Selling, general and administrative	(50,537)	(49,847)	(47,802)	(50,367)	(51,343)	(50,165)	(46,168)	(45,747)	(198,553)	(193,423)	(182,634)
Depreciation and amortization	(15,386)	(13,893)	(14,089)	(13,170)	(12,783)	(11,463)	(11,263)	(10,555)	(56,538)	(46,064)	(41,166)
Restructuring charges, net	(1,600)	(593)	(617)	(540)	(254)	(758)	(2,572)	(851)	(3,350)	(4,435)	(22,875)
Impairment losses	(373)	0	0	0	0	0	(1,205)	0	(373)	(1,205)	(2,958)
Income from operations	30,128	21,323	20,667	24,357	32,765	25,961	19,675	22,998	96,475	101,399	78,545
Other income (expense)	2,138	(856)	2,880	(178)	(3,793)	(434)	(3,099)	(2,004)	3,984	(9,330)	(4,683)
(Provision for) benefit from income taxes	(8,971)	(5,778)	(5,417)	(2,876)	(7,995)	(6,358)	(3,854)	(2,391)	(23,042)	(20,598)	61
Net income attributable to noncontrolling interest	(1,329)	(1,442)	(1,268)	(1,085)	(1,508)	(1,526)	(407)	(642)	(5,124)	(4,083)	(3,908)
Net income attributable to TeleTech stockholders	$ 21,966	$ 13,247	$ 16,862	$ 20,218	$ 19,469	$ 17,643	$ 12,315	$ 17,961	$ 72,293	$ 67,388	$ 70,015
Weighted average shares outstanding
Basic	48,714	49,093	49,351	50,045	50,439	50,732	51,861	52,347	49,297	51,338	54,738
Diluted	49,514	49,940	50,111	50,973	51,465	51,678	52,628	53,217	50,102	52,244	55,540
Net income per share attributable to TeleTech stockholders
Basic	$ 0.45	$ 0.27	$ 0.34	$ 0.40	$ 0.39	$ 0.35	$ 0.24	$ 0.34	$ 1.47	$ 1.31	$ 1.28
Diluted	$ 0.44	$ 0.27	$ 0.34	$ 0.40	$ 0.38	$ 0.34	$ 0.23	$ 0.34	$ 1.44	$ 1.29	$ 1.26