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Investments (Narrative) (Details) R$ in Thousands, $ in Thousands					1 Months Ended		3 Months Ended		12 Months Ended							60 Months Ended
	May 16, 2017 USD ($)	May 15, 2017	May 15, 2017	Dec. 31, 2011	Dec. 31, 2018 BRL (R$)	Apr. 30, 2017	Dec. 31, 2018 USD ($)	Mar. 31, 2017	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 BRL (R$)	Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments									$ 2,038	$ 1,636	$ 1,233
MSIL
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage					49.00%						49.00%					49.00%	49.00%	49.00%	49.00%
Equity method investments																	$ 11,288		$ 10,131
Income (loss) from equity method investments									2,038	1,636	$ 1,233
PST Eletronica Ltda [Member]
Schedule of Equity Method Investments [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%
Noncontrolling interest	$ 14,458										$ 13,762	$ 13,310				$ 13,762			0
Dividends payable					R$ 23,204												5,980	R$ 22,330	6,742
Payments to Noncontrolling Interests	1,500
Fair value of earn-out liability	10,180
Dividends Payable, Price Index Adjustment					R$ 2,752												709	R$ 1,879	$ 567
PST Eletronica Ltda [Member] | Selling, General and Administrative Expenses [Member]
Schedule of Equity Method Investments [Line Items]
Expense related to fair value adjustment for earn-out consideration									$ (156)	$ 2,632
PST Eletronica Ltda [Member] | Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest	16,995
PST Eletronica Ltda [Member] | Additional Paid-In Capital
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest	$ 31,453
Autotech Ventures [Member] | Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment commitment																	$ 10,000
Contribution expected period (in years)					10 years
Contribution							$ 437

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