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Inventories, Net and Significant Supplier - Related Party Supplier (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 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	$ 1,977	$ 2,357	$ 3,589	$ 4,451
Concentration risk	2.00%	2.70%	2.00%	2.80%
Affiliated Entity [Member] | Supplier Concentration Risk [Member] | Accounts Payable [Member]
Related Party Transaction
Concentration risk			2.10%		2.50%
Accounts payable	$ 2,053		$ 2,053		$ 2,361

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