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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
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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