Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 179,331	$ 191,041
Accumulated depreciation	(82,866)	(101,768)
Property, plant and equipment, net, excluding construction in progress	96,465	89,273
Construction in progress	14,497	16,078
Total property, plant, and equipment, net	110,962	105,351
Depreciation expense	24,400	20,700	$ 15,600
Impairment of China factory equipment	4,100	0	$ 0
People's Republic of China (PRC)
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, net	93,600	90,000
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,937	48,367
Construction in progress	0	118
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	57,441	67,726
Construction in progress	3,884	4,625
Tooling
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,191	31,773
Construction in progress	3,697	2,219
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,748	22,680
Construction in progress	1,014	1,335
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	18,240	11,581
Construction in progress	5,714	7,674
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,620	3,794
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,154	5,120
Other
Property, Plant and Equipment [Line Items]
Construction in progress	188	$ 107
Cost of sales
Property, Plant and Equipment [Line Items]
Impairment of China factory equipment	3,800
Selling, general and administrative
Property, Plant and Equipment [Line Items]
Impairment of China factory equipment	$ 300