SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 310,223	$ 295,490	$ 635,744	$ 597,711
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	157,740	137,596	329,393	284,065
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	85,585	85,541	170,572	172,207
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	37,623	43,258	78,177	85,304
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	19,290	22,267	38,603	41,484
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,548	1,470	2,888	2,893
Asia Pacific[ Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 8,437	$ 5,358	$ 16,111	$ 11,758