Inventories, Net and Significant Suppliers - Inventories, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 61,220	$ 68,834
Components	25,239	25,071
Work in process	1,526	5,577
Finished goods	68,175	50,006
Reserve for excess and obsolete inventory	(11,025)	(5,138)	$ (4,288)	$ (4,205)
Inventories, net	$ 145,135	$ 144,350

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