SIGNIFICANT CLIENTS(NARRATIVE) (DETAILS) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Entity Wide Revenue Major Customer Line Items
Revenue from major customer as a percentage of total revenue	11.90%	9.40%
Accounts receivable amount from major customer	$ 25.0	$ 21.5

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.

No definition available.

Name:	ttec_EntityWideAccountsReceivableMajorCustomerAmount
Namespace Prefix:	ttec_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant