SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 305,900	$ 296,995	$ 903,611	$ 875,070
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	143,854	137,205	427,919	401,294
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	89,963	89,206	262,171	263,365
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	42,725	43,343	128,029	132,673
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	20,825	18,929	62,308	52,551
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,365	3,808	4,258	12,100
Asia Pacific[ Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 7,168	$ 4,504	$ 18,926	$ 13,087