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Summary of Significant Accounting Policies (Narrative) (Details) R$ in Thousands, $ in Thousands				1 Months Ended	3 Months Ended		12 Months Ended								60 Months Ended
	May 15, 2017	May 15, 2017	Dec. 31, 2011	Apr. 30, 2017	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 BRL (R$)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2016 shares	Jan. 01, 2019 USD ($)	May 16, 2017
Accounting Policy [Line Items]
Depreciation expense							$ 22,786		$ 21,490	$ 19,998
Less: Net loss attributable to noncontrolling interest					$ (100)	$ (30)			(130)	(1,887)
Preproduction costs related to long-term supply arrangements, costs capitalized							6,875		9,260
Impairment of Goodwill							0		0	0
Intangible assets, net							62,032		75,243
Amortization							6,406		6,440	3,259
Amortization expense next year							6,205
Amortization expense year two							6,205
Amortization expense year three							6,205
Amortization expense year four							6,205
Amortization expense year five							$ 6,205
Intangible assets, weighted-average remaining amortization period, years							12 years
Intangible impairment charge							$ 202
Design and development expense							$ 51,074		$ 48,877	$ 40,212
Design and development expense percentage							5.90%	5.90%	5.90%	5.80%
Research and development expense reimbursed							$ 16,540		$ 14,946	$ 12,764
Share-based compensation expense							5,632		7,265	6,134
Share-based compensation expense capitalized as inventory							0		0	0
Cumulative goodwill impairment							300,083		300,083
Product warranty and recall accrual							3,283		3,112
Inventory amount, FIFO							64,745		54,837
Inventory amount, weighted average cost							14,533		18,634
Foreign currency transaction gain (loss)							487		(500)	268
Amortization of financing costs							326		324	355
Deferred financing costs, net							882		1,208
Selling, General and Administrative Expenses [Member]
Accounting Policy [Line Items]
Share-based compensation expense							5,632		7,265	6,134
Selling, General and Administrative Expenses [Member] | CEO Retirement Additional Expense [Member]
Accounting Policy [Line Items]
Additional stock compensation expense in connection with retirement of former President and CEO										$ 545
Prepaid Expenses and Other Current Assets [Member]
Accounting Policy [Line Items]
Preproduction costs related to long-term supply arrangements, costs capitalized							6,875		8,894
Electronics [Member]
Accounting Policy [Line Items]
Acquisition of business									33,628
Intangible impairment charge							202
PST [Member]
Accounting Policy [Line Items]
Accounts receivable sold							$ 0	R$ 7,983	2,520
Gain (loss) on sale of accounts receivable								273	(86)
Proceeds from sale of accounts receivable								R$ 7,710	$ 2,434
Performance Based Restricted Common Shares [Member]
Accounting Policy [Line Items]
Common shares, non-vested | shares							0		0	0					0
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares							0		0	0					0
Performance Based Right to Receive Common Shares [Member]
Accounting Policy [Line Items]
Common shares, non-vested | shares							628,220		766,538	843,140					843,140
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number | shares							628,220		766,538	843,140					843,140
Customer Lists [Member]
Accounting Policy [Line Items]
Intangible assets, net							$ 37,651		$ 44,977
Customer Lists [Member] | Electronics [Member]
Accounting Policy [Line Items]
Intangible assets, net							25,501
Customer Lists [Member] | PST [Member]
Accounting Policy [Line Items]
Intangible assets, net							12,150
Trade Names [Member]
Accounting Policy [Line Items]
Intangible assets, net							14,805		17,900
Trade Names [Member] | Electronics [Member]
Accounting Policy [Line Items]
Intangible assets, net							4,939
Trade Names [Member] | PST [Member]
Accounting Policy [Line Items]
Intangible assets, net							9,866
Technology [Member]
Accounting Policy [Line Items]
Intangible assets, net							9,576		12,366
Technology [Member] | Electronics [Member]
Accounting Policy [Line Items]
Intangible assets, net							4,566
Technology [Member] | PST [Member]
Accounting Policy [Line Items]
Intangible assets, net							$ 5,010
PST Eletronica Ltda [Member]
Accounting Policy [Line Items]
Percentage ownership in consolidated subsidiary	74.00%	74.00%	74.00%	74.00%		74.00%				74.00%	74.00%	74.00%	74.00%	74.00%	74.00%
Percentage of additional noncontrolling interest acquired																	26.00%
Less: Net loss attributable to noncontrolling interest									$ 130	$ 1,887
MSIL
Accounting Policy [Line Items]
Equity method investment, ownership percentage							49.00%		49.00%	49.00%					49.00%
Equity method investments							$ 11,288		$ 10,131
Maximum [Member] | ASU 2016-02
Accounting Policy [Line Items]
Operating lease, right-of-use asset																$ 21,200
Operating lease liability																21,200
Maximum [Member] | Pre-production Costs [Member]
Accounting Policy [Line Items]
Property, plant and equipment, useful life							5 years
Minimum [Member] | ASU 2016-02
Accounting Policy [Line Items]
Operating lease, right-of-use asset																15,600
Operating lease liability																$ 15,600
Minimum [Member] | Pre-production Costs [Member]
Accounting Policy [Line Items]
Property, plant and equipment, useful life							3 years

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