ACQUISITIONS (NARRATIVE) (DETAILS) (USD $)	3 Months Ended		9 Months Ended		0 Months Ended		2 Months Ended		2 Months Ended	9 Months Ended		9 Months Ended	12 Months Ended		12 Months Ended	7 Months Ended		7 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jan. 02, 2012 Onstate [Member]	Jan. 02, 2012 Onstate [Member] Computer Software, Intangible Asset [Member]	Feb. 27, 2012 Iknowtion [Member]	Sep. 30, 2013 Iknowtion [Member]	Feb. 27, 2012 Iknowtion [Member] Customer relationships, gross [Member]	Oct. 04, 2012 Guidon [Member]	Sep. 30, 2013 Guidon [Member]	Oct. 04, 2012 Guidon [Member] Customer relationships, gross [Member]	Dec. 31, 2012 Technology Solutions Group [Member]	Sep. 30, 2013 Technology Solutions Group [Member]	Dec. 31, 2012 Technology Solutions Group [Member] Customer relationships, gross [Member]	Aug. 09, 2013 WebMetro [Member]	Sep. 30, 2013 WebMetro [Member]	Aug. 09, 2013 WebMetro [Member] Customer relationships, gross [Member]	Aug. 09, 2013 WebMetro [Member] Computer Software, Intangible Asset [Member]
Business Acquisition [Line Items]
Date of Acquisition					Jan. 01, 2012		Feb. 27, 2012			Oct. 04, 2012			Dec. 31, 2012			Aug. 09, 2013
Percentage of Voting Interests Acquired					100.00%		80.00%			100.00%			100.00%			100.00%
Description of Acquired Entity					OnState provides hosted business process outsourcing solutions to a variety of small businesses. OnState was headquartered in Boston, MA with a minimal employee base.		iKnowtion integrates proven marketing analytics methodologies and business consulting capabilities to help clients improve their return on marketing expenditures in such areas as demand generation, share of wallet, and channel mix optimization. iKnowtion is located in Boston, MA and has approximately 40 employees.			Guidon provides operational consulting services and designs solutions for operational and cultural transformation for global clients. Guidon is located in Mesa, AZ and has approximately 25 employees.			”). TSG designs and implements custom communications systems for a variety of business types and sizes. TSG is located in Aurora, IL and has approximately 90 employees.			WebMetro is a digital marketing agency that provides online direct marketing services. WebMetro has offices in San Dimas and Los Angeles, California and Modiin, Israel and has approximately 90 employees.
Purchase Price of Acquired Entity					$ 3,300,000											$ 16,400,000
Cost of Acquired Entity, Cash Paid					3,100,000
Cost of Acquired Entity, Up Front Cash Consideration							1,000,000			5,600,000			32,700,000
Cost of Acquired Entity, Working Capital Adjustment Paid							200,000			100,000			600,000
Cost of Acquired Entity, Transaction Costs					100,000		100,000			100,000			100,000
Weighted Average Useful Life of Acquired Intangible Assets						4 years 0 months 0 days			5 years 0 months 0 days			5 years 0 months 0 days			10 years 0 months 0 days			6 years 0 months 0 days	4 years 0 months 0 days
Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount					1,100,000		400,000			3,600,000			19,400,000			5,000,000
Future Value of Liabilities Incurred From Business Acquisitions	14,800,000		14,800,000				4,300,000			2,800,000			7,300,000			1,400,000
Valuation Technique on Contingent Consideration							The fair value of the contingent payments was measured based on significant inputs not observable in the market (Level 3 inputs). Key assumptions include a discount rate of 21% and expected future value of payments of $4.3 million. The $4.3 million of expected future payments was calculated using a probability weighted EBITDA assessment with higher probability associated with iKnowtion achieving the maximum EBITDA targets. These purchase price payables were recognized at fair value using a discounted cash flow approach and a discount rate of 21.0%, 21.0%, 4.6%, or 5.3%, respectively. These measurements were based on significant inputs not observable in the market. The Company will record interest expense each period using the effective interest method until the future value of these purchase price payables reaches their expected future value of $14.8 million.									The fair value of the contingent payments was measured based on significant inputs not observable in the market (Level 3 inputs). Key assumptions include a discount rate of 5.3% and expected future value of payments of $1.4 million. The $1.4 million of expected future payments was calculated using a probability weighted EBITDA assessment with higher probability associated with WebMetro achieving the smaller EBITDA targets.
Contingent Consideration Arrangements, Basis for Amount							In the event iKnowtion meets certain EBITDA targets for calendar year 2015, the purchase and sale agreement requires TeleTech to purchase the remaining 20% interest in iKnowtion in 2016 for an amount equal to a multiple of iKnowtions’s 2015 EBITDA as defined in the purchase and sale agreement. These terms represent a contingent redemption feature. The fair value of the redemption feature is based on a comparison of EBITDA multiples and the EBITDA multiple to purchase the remaining 20% of iKnowtion approximates EBITDA multiples in the market for similar acquisitions.			The Company is also obligated to make earn-out payments over the next two years if Guidon achieves specified EBITDA targets as defined in the stock purchase agreement. The fair value of the contingent payments was measured based on significant inputs not observable in the market (Level 3 inputs). Key assumptions included in the fair value calculation include a discount rate of 21% and expected future value of payments of $2.8 million. The $2.8 million of expected future payments was calculated using a probability weighted EBITDA assessment with higher probability associated with Guidon achieving the maximum EBITDA targets.			The Company is also obligated to make earn-out payments over three years if TSG achieves specified EBITDA targets, as defined by the stock purchase agreement. The fair value of the contingent payments was measured based on significant inputs not observable in the market (Level 3 inputs). Key assumptions included in the fair value calculation include a discount rate of 4.6% and expected future value of payments of $7.3 million. The $7.3 million of expected future payments was calculated using a probability weighted EBITDA assessment with higher probability associated with TSG achieving the maximum EBITDA targets.
Contingent Consideration, at fair value							2,900,000	3,000,000		2,100,000	2,500,000		6,700,000	6,900,000		1,300,000	1,300,000
Contingent consideration, fair value, current portion								1,100,000			1,400,000			2,400,000			200,000
Contingent consideration, fair value, noncurrent portion								1,900,000			1,100,000			4,500,000			1,100,000
Acquisition of Less than 100 Percent, Noncontrolling Interest, Valuation Technique							The fair value of the 20% noncontrolling interest in iKnowtion at the date of acquisition was $0.9 million and was estimated based on a 20% interest of the fair value of a 100% interest in iKnowtion and was discounted for a lack of control at a rate of 23.1%.
Revenue of Acquirees since Acquisition Date, Actual	19,400,000	2,200,000	47,100,000	4,900,000
Income (loss) from operations of Acquirees since Acquisition Date, Actual	2,700,000	400,000	4,900,000	800,000
Business Combination Pro Forma Information Amortization Expense of Acquirees Since Acquisition	$ 1,200,000	$ 100,000	$ 2,900,000	$ 200,000