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Inventories, Net and Significant Suppliers - Related Party Supplier (Details) - Supplier Concentration Risk [Member] - Affiliated Entity [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cost of Goods, Total [Member]      
Related Party Transactions [Line Items]      
Inventory purchases form related party $ 8,550 $ 9,188 $ 9,846
Concentration risk 2.50% 3.20% 3.50%
Accounts Payable [Member]      
Related Party Transactions [Line Items]      
Accounts payable, related parties $ 2,361 $ 2,378  
Concentration risk 2.50% 3.40%