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Segment Reporting Revenue from External Customers by Products and Services (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenue from External Customer [Line Items]      
Revenue, Net $ 1,166,674 $ 1,248,264 $ 1,320,184
UNITED STATES
     
Revenue from External Customer [Line Items]      
Revenue, Net 289,866 372,014 353,416
Americas [Member]
     
Revenue from External Customer [Line Items]      
Revenue, Net 177,602 195,748 252,316
Asia Pacific [Member]
     
Revenue from External Customer [Line Items]      
Revenue, Net 220,945 235,658 240,220
Europe Middle East Africa [Member]
     
Revenue from External Customer [Line Items]      
Revenue, Net $ 478,261 $ 444,844 $ 474,232