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Segment, Product and Geographic Information (Details 5) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Significant Customer [Line Items]    
Accounts receivable $ 79,799 $ 106,474
INX and its Affiliates [Member]    
Segment Reporting Significant Customer [Line Items]    
Accounts receivable 39,311 58,530
Customer A And Its Affiliates [Member]    
Segment Reporting Significant Customer [Line Items]    
Accounts receivable $ 40,488 $ 47,944