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Goodwill and Other Intangible Assets, Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Goodwill by operating segment [Abstract] |  |
Goodwill gross, beginning balance | $ 105,809 | $ 105,901
Goodwill accumulated impairment losses, Beginning balance | (38,488) | (38,488)
Goodwill net, beginning balance | 67,321 | 67,413
Goodwill foreign currency exchange rate change | 80 | (92)
Goodwill gross, ending balance | 116,290 | 105,809
Goodwill accumulated impairment losses, Ending balance | (38,488) | (38,488)
Goodwill net, ending balance | 77,802 | 67,321
Pollak business of Stoneridge, Inc. [Member] |  |
Goodwill by operating segment [Abstract] |  |
Goodwill acquisition | 10,401 |
Engine Management [Member] |  |
Goodwill by operating segment [Abstract] |  |
Goodwill gross, beginning balance | 91,539 | 91,631
Goodwill accumulated impairment losses, Beginning balance | (38,488) | (38,488)
Goodwill net, beginning balance | 53,051 | 53,143
Goodwill foreign currency exchange rate change | 80 | (92)
Goodwill gross, ending balance | 102,020 | 91,539
Goodwill accumulated impairment losses, Ending balance | (38,488) | (38,488)
Goodwill net, ending balance | 63,532 | 53,051
Engine Management [Member] | Pollak business of Stoneridge, Inc. [Member] |  |
Goodwill by operating segment [Abstract] |  |
Goodwill acquisition | 10,401 |
Temperature Control [Member] |  |
Goodwill by operating segment [Abstract] |  |
Goodwill gross, beginning balance | 14,270 | 14,270
Goodwill accumulated impairment losses, Beginning balance | 0 | 0
Goodwill net, beginning balance | 14,270 | 14,270
Goodwill foreign currency exchange rate change | 0 | 0
Goodwill gross, ending balance | 14,270 | 14,270
Goodwill accumulated impairment losses, Ending balance | 0 | 0
Goodwill net, ending balance | 14,270 | $ 14,270
Temperature Control [Member] | Pollak business of Stoneridge, Inc. [Member] |  |
Goodwill by operating segment [Abstract] |  |
Goodwill acquisition | $ 0 |

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