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Segment, Product and Geographic Information (Details 5) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Significant Customer [Line Items]    
Accounts receivable $ 91,688 $ 102,630
INX and its Affiliates [Member]
   
Segment Reporting Significant Customer [Line Items]    
Accounts receivable 48,443 73,432
Customer A And Its Affiliates [Member]
   
Segment Reporting Significant Customer [Line Items]    
Accounts receivable $ 43,245 $ 29,198