QUARTERLY FINANCIAL DATA (UNAUDITED) (QUARTERLY FINANCIALS TABLE) (DETAILS) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
QUARTERLY FINANCIAL DATA (UNAUDITED) [ABSTRACT]
Sales Revenue Services Net	$ 341,816	$ 309,195	$ 310,223	$ 325,521	$ 338,170	$ 305,900	$ 295,490	$ 302,221	$ 1,286,755	$ 1,241,781	$ 1,193,157
Cost of services	(245,668)	(225,978)	(223,617)	(232,984)	(240,146)	(220,244)	(212,315)	(213,787)	(928,247)	(886,492)	(846,631)
Selling, general and administrative	(48,575)	(48,418)	(47,376)	(50,237)	(50,537)	(49,847)	(47,802)	(50,367)	(194,606)	(198,553)	(193,423)
Depreciation and amortization	(17,279)	(15,486)	(15,680)	(15,363)	(15,386)	(13,893)	(14,089)	(13,170)	(63,808)	(56,538)	(46,064)
Restructuring charges, net	(185)	(622)	(198)	(809)	(1,600)	(593)	(617)	(540)	(1,814)	(3,350)	(4,435)
Impairment losses	(5,034)	(3,066)	0	0	(373)	0	0	0	(8,100)	(373)	(1,205)
Income from operations	25,075	15,625	23,352	26,128	30,128	21,323	20,667	24,357	90,180	96,475	101,399
Other income (expense)	(590)	(1,995)	(18)	(1,688)	2,138	(856)	2,880	(178)	(4,291)	3,984	(9,330)
Benefit from (provision for) income taxes	(6,566)	(1,192)	(7,841)	(4,405)	(8,971)	(5,778)	(5,417)	(2,876)	(20,004)	(23,042)	(20,598)
Net income attributable to noncontrolling interest	(916)	(1,243)	(797)	(1,263)	(1,329)	(1,442)	(1,268)	(1,085)	(4,219)	(5,124)	(4,083)
Net income attributable to TeleTech stockholders	$ 17,003	$ 11,195	$ 14,696	$ 18,772	$ 21,966	$ 13,247	$ 16,862	$ 20,218	$ 61,666	$ 72,293	$ 67,388
Weighted average shares outstanding
Basic	48,439	48,345	48,325	48,370	48,714	49,093	49,351	50,045	48,370	49,297	51,338
Diluted	48,853	48,936	49,064	49,158	49,514	49,940	50,111	50,973	49,011	50,102	52,244
Net income per share attributable to TeleTech stockholders
Basic	$ 0.35	$ 0.23	$ 0.30	$ 0.39	$ 0.45	$ 0.27	$ 0.34	$ 0.40	$ 1.27	$ 1.47	$ 1.31
Diluted	$ 0.35	$ 0.23	$ 0.30	$ 0.38	$ 0.44	$ 0.27	$ 0.34	$ 0.40	$ 1.26	$ 1.44	$ 1.29