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Investments (Narrative) (Details) BRL in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 BRL	Dec. 31, 2016 USD ($)	Dec. 31, 2015 BRL	Dec. 31, 2015 USD ($)	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments									$ 1,233	$ 608	$ 815
Noncontrolling interest													$ 13,762		$ 13,310
Less: income (loss) attributable to noncontrolling interest	$ 122	$ (303)	$ (576)	$ (1,130)	$ (1,133)	$ (69)	$ (596)	$ (409)	$ (1,887)	$ (2,207)	$ (13,483)
PST Eletronica Ltda [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage																50.00%
Percentage ownership in consolidated subsidiary									74.00%	74.00%	74.00%
Noncontrolling interest											$ 22,540		13,762		13,310
Noncontroling interest increase (decrease)									$ 452	$ (9,240)	(16,990)
Foreign currency translation adjustments									2,339	(7,033)	(3,507)
Less: income (loss) attributable to noncontrolling interest									(1,887)	(2,207)	(13,483)
Comprehensive income (loss) related to noncontrolling interest									452	(9,240)	(16,990)
Dividends payable to noncontrolling interest												BRL 10,842	$ 3,327	BRL 10,842	2,777
Minda Stoneridge Instruments Ltd [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage												49.00%	49.00%
Equity method investments													$ 7,952		$ 6,929
Income (loss) from equity method investments									$ 1,233	$ 608	$ 815

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