SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 318,087	$ 296,995	$ 289,692	$ 288,383	$ 295,261	$ 286,268	$ 288,798	$ 292,654	$ 1,193,157	$ 1,162,981	$ 1,179,388
Property, plant and equipment, gross	575,499				555,054				575,499	555,054	535,191
Other long-term assets	44,084				44,924				44,084	44,924	28,476
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									556,239	474,236	405,424
Property, plant and equipment, gross	337,311				311,904				337,311	311,904	280,469
Other long-term assets	33,249				34,118				33,249	34,118	21,050
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									354,942	334,541	336,710
Property, plant and equipment, gross	101,123				107,676				101,123	107,676	100,048
Other long-term assets	4,408				4,124				4,408	4,124	3,852
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									176,906	188,071	206,986
Property, plant and equipment, gross	75,618				70,915				75,618	70,915	81,070
Other long-term assets	5,299				4,696				5,299	4,696	1,048
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									72,644	111,304	161,782
Property, plant and equipment, gross	12,311				8,767				12,311	8,767	20,186
Other long-term assets	311				887				311	887	848
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									18,489	17,652	17,300
Property, plant and equipment, gross	28,195				29,884				28,195	29,884	27,630
Other long-term assets	779				1,004				779	1,004	1,466
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									13,937	37,177	51,186
Property, plant and equipment, gross	20,941				25,908				20,941	25,908	25,788
Other long-term assets	$ 38				$ 95				$ 38	$ 95	$ 212