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INCOME TAXES (NARRATIVE) (DETAILS) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
INCOME TAXES [ABSTRACT] |  |
Total deferred tax assets, net of valuation allowance | $ 52,800,000 us-gaap_DeferredTaxAssetsNet |
Valuation allowance on deferred tax assets | 10,400,000 us-gaap_DeferredTaxAssetsValuationAllowance |
Deferred tax assets, net of valuation allowance and deferred tax liabilities | 49,900,000 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Effective income tax rate | 18.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 11.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Canada [Member] |  |
Significant Change in Unrecognized Tax Benefits Is Reasonably Possible [LineItems] |  |
Significant Change in Unrecognized Tax Benefits, Nature of Event | During the first quarter of 2014, a benefit of $1.2 million was recorded due to the closing of statutes of limitations in Canada. |
Tax Adjustments, Settlements, and Unusual Provisions |  | 1,200,000 us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeTaxAuthorityAxis = ttec_CanadaMember
Income Tax Examination [Line Items] |  |
Income Tax Years under Audit | 2009 and 2010 |
United States [Member] |  |
Income Tax Examination [Line Items] |  |
Income Tax Years under Audit | 2011 to present |
Technology Solutions Group [Member] |  |
Income Tax Examination [Line Items] |  |
Income Tax Years under Audit | 2012 |

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- Definition Tax year(s) being audited by the corresponding tax regulation agency. Can be shown in multiple years. + References No definition available. + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28446-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28511-109314 + Details
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