Inventories, Net and Significant Suppliers - Changes in Reserve for Excess and Obsolete Inventory (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Reserve for Excess and Obsolete Inventory
Balance at beginning of period	$ 5,138	$ 4,288	$ 4,205
Additions charged to costs and expenses	12,792	6,702	3,685
Sell through	(1,500)	(1,825)	(1,242)
(Write-offs)/Foreign exchange effects	(5,405)	(4,027)	(2,360)
Balance at end of period	$ 11,025	$ 5,138	$ 4,288