SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	$ 312,796	$ 309,195	$ 930,311	$ 944,939
Other long-term assets	45,485		45,485		$ 42,486
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	166,993	159,461	507,819	488,854
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	90,692	84,450	259,898	255,021
Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	30,832	34,585	90,154	112,763
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	15,604	20,401	49,100	59,004
Asia Pacific[ Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	7,784	8,756	20,320	24,867
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	$ 891	$ 1,542	$ 3,020	$ 4,430