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FAIR VALUE (NARRATIVE) (DETAILS) (USD $) | 12 Months Ended |
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
FAIR VALUE [Abstract] |  |  |
Average interest rate on annual borrowings | 1.20%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod | 1.40%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod |
Business Combination Contingent Consideration Liability |  |  | $ 16,990,000us-gaap_BusinessCombinationContingentConsiderationLiability
Future Value of Liabilities Incurred From Business Acquisitions | $ 25,700,000ttec_BusinessAcquisitionFutureValueOfLiabilitiesIncurred |  |

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- Definition Future value of liabilities incurred by the acquirer to former owners of the acquiree. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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Balance Type: | credit
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- Details
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- Definition The effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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