RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES (NARRATIVE) (DETAILS) (USD $)	6 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Spain [Member]	Jun. 30, 2012 Spain [Member] Closure of Delivery Centers [Member]	Jun. 30, 2012 Spain [Member] Reduction in Force [Member]	Jun. 30, 2013 Customer Management Services [Member]	Jun. 30, 2012 Customer Management Services [Member]	Jun. 30, 2013 Customer Management Services [Member]	Jun. 30, 2012 Customer Management Services [Member]	Jun. 30, 2012 Customer Growth Services [Member]	Jun. 30, 2013 Customer Strategy Services [Member]
RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES [Abstract]
Description of assets subject to impairment	During each of the periods presented, the Company evaluated the recoverability of its leasehold improvement assets at certain delivery centers.
Method used to determine fair value of assets subject to impairment	To determine fair value, the Company used Level 3 inputs in its discounted cash flows analysis. Assumptions included the amount and timing of estimated future cash flows and assumed discount rates.
Asset Impairment [Line Items]
Impairment of leasehold						$ 100,000	$ 1,000,000	$ 100,000	$ 1,000,000
Impairment of intangible assets										1,800,000	1,100,000
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2,545,000	4,079,000	300,000	400,000	14,700,000
Payments	$ (4,957,000)		$ 14,800,000