Inventories, Net and Significant Suppliers - Inventory Reserves (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Reserve for Excess and Obsolete Inventory
Balance at beginning of period		$ 3,045	$ 2,539	$ 2,714
Additions charged to costs and expenses	[1]	3,464	3,070	3,181
Sell through	[2]	(1,116)	(1,108)	(869)
Write-offs/Foreign exchange effects		(1,188)	(1,456)	(2,487)
Balance at end of period		4,205	3,045	2,539
Inventory scrapped during production		$ 300	$ 300	$ 300

[1] The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $0.3 million, $0.3 million, and $0.3 million for the years ended December 31, 2016, 2015, and 2014, respectively. These amounts are production waste and are not included in management’s reserve for excess and obsolete inventory.

[2] These amounts represent the reversal of reserves associated with inventory items that were sold during the period.