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Inventories, Net and Significant Supplier - Related Party Supplier (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Executive Vice President [Member]
Related Party Transaction
Ownership percentage in third party by executive			40.00%
Affiliated Entity [Member] | Supplier Concentration Risk [Member] | Cost of Goods, Total [Member]
Related Party Transaction
Purchases from related party	$ 1,382	$ 2,115	$ 4,971	$ 6,566
Concentration risk percentage	1.50%	2.30%	1.80%	2.60%
Affiliated Entity [Member] | Supplier Concentration Risk [Member] | Accounts Payable [Member]
Related Party Transaction
Concentration risk percentage			1.70%		2.50%
Accounts payable	$ 1,755		$ 1,755		$ 2,361

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