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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