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SEGMENT INFORMATION (REVENUE GEOGRAPHY) (DETAILS) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue $ 295,261 $ 286,268 $ 288,798 $ 292,654 $ 300,538 $ 304,235 $ 293,636 $ 280,979 $ 1,162,981 $ 1,179,388 $ 1,094,906
Property, plant and equipment, gross 555,054       535,191       555,054 535,191  
Other long-term assets 99,385       62,153       99,385 62,153  
United States [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue                 474,236 405,424 406,652
Property, plant and equipment, gross 311,904       280,469       311,904 280,469 274,335
Other long-term assets 73,979       41,889       73,979 41,889 14,417
Philippines [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue                 334,541 336,710 292,726
Property, plant and equipment, gross 107,676       100,048       107,676 100,048 88,513
Other long-term assets 4,124       3,852       4,124 3,852 2,906
Latin America [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue                 188,071 206,986 203,420
Property, plant and equipment, gross 70,915       81,070       70,915 81,070 88,984
Other long-term assets 4,696       1,048       4,696 1,048 1,143
Europe Middle East Africa [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue                 111,304 161,782 120,643
Property, plant and equipment, gross 8,767       20,186       8,767 20,186 25,261
Other long-term assets 15,487       13,686       15,487 13,686 17,241
Canada [Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue                 37,177 51,186 52,396
Property, plant and equipment, gross 25,908       25,788       25,908 25,788 29,697
Other long-term assets 95       212       95 212 113
Asia Pacific[ Member]
                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenue                 17,652 17,300 19,069
Property, plant and equipment, gross 29,884       27,630       29,884 27,630 27,100
Other long-term assets $ 1,004       $ 1,466       $ 1,004 $ 1,466 $ 1,626