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Investments (Narrative) (Details) R$ in Thousands, $ in Thousands	3 Months Ended		9 Months Ended		64 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	May 15, 2017	Sep. 30, 2019 BRL (R$)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 BRL (R$)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 BRL (R$)	Sep. 30, 2018 USD ($)	May 16, 2017
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	$ 318	$ 249	$ 1,230	$ 1,435
MSIL
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage						49.00%	49.00%			49.00%	49.00%
Equity method investments							$ 12,351		$ 11,288
Income (loss) from equity method investments	$ 318	$ 249	$ 1,230	$ 1,435
PST Eletronica Ltda [Member]
Schedule of Equity Method Investments [Line Items]
Percentage ownership in consolidated subsidiary					74.00%
Percentage of additional noncontrolling interest acquired												26.00%
Dividends Payable, Price Index Adjustment						R$ 668	162			R$ 766	$ 189
PST Eletronica Ltda [Member] | Noncontrolling interest
Schedule of Equity Method Investments [Line Items]
Dividends payable						R$ 23,871	5,745	R$ 23,204	5,980
Autotech Ventures [Member] | Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment commitment									10,000
Investment							1,653		$ 437
Contribution expected period (in years)			10 years
Contribution by company							$ 1,200

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