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Investments (Narrative) (Details) BRL in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 BRL | Sep. 30, 2016 USD ($) | Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Income (loss) from equity method investments | $ 307 | $ 160 | $ 603 | $ 492 |  |  |
Noncontrolling interest |  |  |  |  |  | $ 13,704 | $ 13,310
Less: Net loss attributable to noncontrolling interest | (303) | (69) | $ (2,009) | (1,074) |  |  |
PST Eletronica Ltda [Member] |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Percentage ownership in consolidated subsidiary |  |  | 74.00% |  |  |  |
Noncontrolling interest |  | 14,273 |  | 14,273 |  | 13,704 |
Foreign currency translation adjustments |  |  | $ 2,403 | (7,203) |  |  |
Less: Net loss attributable to noncontrolling interest |  |  | (2,009) | (1,074) |  |  |
Comprehensive income (loss) related to noncontrolling interest | (467) | (4,080) | 394 | (8,277) |  |  |
Dividends payable |  |  |  |  | BRL 10,842 | $ 3,340 |
Minda Stoneridge Instruments Ltd [Member] |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  | 49.00% | 49.00% |
Equity method investments |  |  |  |  |  | $ 7,846 | $ 6,929
Income (loss) from equity method investments | $ 307 | $ 160 | $ 603 | $ 492 |  |  |

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