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Investments (Narrative) (Details) BRL in Thousands, $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2016 BRL | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Income (loss) from equity method investments | $ 143 | $ 189 |  |  |
Noncontrolling interest |  |  |  | $ 13,370 | $ 13,310
Less: income (loss) attributable to noncontrolling interest | $ (1,130) | (409) |  |  |
PST Eletronicaltda [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Percentage ownership in consolidated subsidiary | 74.00% |  |  |  |
Noncontrolling interest |  | 18,321 |  | 13,370 |
Foreign currency translation adjustments | $ 1,190 | (3,820) |  |  |
Less: income (loss) attributable to noncontrolling interest | (1,130) | (409) |  |  |
Comprehensive income (loss) related to noncontrolling interest | 60 | (4,229) |  |  |
Dividends payable |  |  | BRL 10,842 | $ 3,046 |
Minda Stoneridge Instruments Ltd [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage |  |  | 49.00% | 49.00% |
Equity method investments |  |  |  | $ 7,067 | $ 6,929
Income (loss) from equity method investments | $ 143 | $ 189 |  |  |

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