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ACCOUNTS RECEIVABLE (SIGNIFICANT CLIENTS TABLE) (DETAILS) (Telecommunications Client [Member], Customer Management Services [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Telecommunications Client [Member] | Customer Management Services [Member] |  |  |
Entity Wide Revenue Major Customer Line Items |  |  |
Revenue from major customer as a percentage of total revenue | 10.20% | 9.00% | 8.00%
Accounts receivable amount from major customer | $ 25,471 | $ 19,093 | $ 27,827

X
- Definition Amount of accounts receivable balance from revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | ttec_EntityWideAccountsReceivableMajorCustomerAmount
Namespace Prefix: | ttec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration