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ACQUISITIONS - Maval OE Steering (Details) - USD ($) $ in Thousands | Jan. 19, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  | $ 52,639 | $ 29,531 | $ 27,522 | $ 17,757
Maval OE Steering |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets | $ 3,870 | $ 3,870 |  |  |
Goodwill | 6,001 |  |  |  |
Assets acquired (net of liabilities assumed) | 3,441 |  |  |  |
Fair value of net assets acquired and liabilities assumed | $ 13,312 |  |  |  |

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