SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 325,521	$ 302,221
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	171,653	146,469
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	84,987	86,666
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	40,554	42,046
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	19,313	19,217
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,340	1,423
Asia Pacific[ Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 7,674	$ 6,400