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QUARTERLY FINANCIAL DATA (UNAUDITED) (NARRATIVE) (DETAILS) (USD $) In Millions, 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
QUARTERLY FINANCIAL DATA (UNAUDITED) [ABSTRACT] |  |  |  |  |  |  |  |  |
Benefit to Income Taxes from Relase of Uncertain Tax Positions |  |  | $ 1.2ttec_UnrecognizedTaxBenefitsDecreasesTotal |  |  |  |  |  |
Net Change in Valuation Allowance |  | 0.2us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |  | 0.6us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 2.0us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 0.4us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 0.3us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 0.9us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | (0.1)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Benefit to Income Taxes Related to Return to Provision Adjustments |  |  |  |  | 0.7ttec_ReturnToProvisionAdjustments | 0.3ttec_ReturnToProvisionAdjustments | 0.5ttec_ReturnToProvisionAdjustments | 0.6ttec_ReturnToProvisionAdjustments |
Benefit to Income Taxes Related to Restructuring Charges | 0.6ttec_TaxBenefitRelatedToRestructuringCharges | 0.2ttec_TaxBenefitRelatedToRestructuringCharges | 0.2ttec_TaxBenefitRelatedToRestructuringCharges | 0.2ttec_TaxBenefitRelatedToRestructuringCharges | 0.1ttec_TaxBenefitRelatedToRestructuringCharges | 0.3ttec_TaxBenefitRelatedToRestructuringCharges | 1.2ttec_TaxBenefitRelatedToRestructuringCharges | 0.2ttec_TaxBenefitRelatedToRestructuringCharges |
Income Tax Expense Netherlands Audit |  | 1.3ttec_IncomeTaxExpenseNetherlandsAudit |  |  |  |  |  |  |
Income Tax Expense Future Value Contingent Payments | $ 1.6ttec_IncomeTaxExpenseFutureValueContingentPayments | $ 0.7ttec_IncomeTaxExpenseFutureValueContingentPayments | $ 1.6ttec_IncomeTaxExpenseFutureValueContingentPayments |  |  |  |  |  | $ 1.6ttec_IncomeTaxExpenseFutureValueContingentPayments

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- Definition Income tax expense related to changes in the value of future contingent payments + References No definition available. + Details
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- Definition Income tax expense related to Netherlands audit + References No definition available. + Details
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- Definition The total net benefit to income tax rexpense related to return to provision adjustments made in a particular period. + References No definition available. + Details
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Namespace Prefix: | ttec_
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- Definition The net tax benefit associated with restructuring charges taken during a particular period. + References No definition available. + Details
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- Definition The gross amount of decreases in tax expense related to the release of uncertain tax positions in total. + References No definition available. + Details
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- Details
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- Definition The amount of the change in the period in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318 + Details
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