SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 309,195	$ 305,900	$ 944,939	$ 903,611
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	159,461	143,854	488,854	427,919
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	84,450	89,963	255,021	262,171
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	34,585	42,725	112,763	128,029
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	20,401	20,825	59,004	62,308
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,542	1,365	4,430	4,258
Asia Pacific[ Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 8,756	$ 7,168	$ 24,867	$ 18,926