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SEGMENTS, Key Financial Data (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) Segment Industry | Dec. 31, 2017 USD ($)
SEGMENTS [Abstract] |  |
Number of industry in which entity operates | Industry | 1 |
Number of reportable operating segments | Segment | 3 |
Summary of key financial data [Abstract] |  |
Net sales | $ 548,184 | $ 491,611
Income from operations | 29,611 | 17,386
Total assets | 443,524 | 431,265
Purchases of property, plant and equipment | 11,594 | 6,425
Depreciation and amortization expense | 18,207 | 20,718
Restructuring charges | 222 | 308
North America [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | 271,691 | 245,834
Asia [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | 187,203 | 167,680
Europe [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | 89,290 | 78,097
Reportable Operating Segments [Member] | North America [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | 284,245 | 257,541
Income from operations | 6,769 | 6,195
Total assets | 177,902 | 172,674
Purchases of property, plant and equipment | 4,836 | 1,734
Depreciation and amortization expense | 8,906 | 10,641
Reportable Operating Segments [Member] | Asia [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | 279,965 | 249,506
Income from operations | 16,621 | 8,964
Total assets | 175,713 | 152,447
Purchases of property, plant and equipment | 5,661 | 2,617
Depreciation and amortization expense | 5,842 | 6,728
Reportable Operating Segments [Member] | Europe [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | 103,853 | 89,765
Income from operations | 6,221 | 2,227
Total assets | 89,909 | 106,144
Purchases of property, plant and equipment | 1,097 | 2,074
Depreciation and amortization expense | 3,459 | 3,349
Intersegment Eliminations [Member] |  |
Summary of key financial data [Abstract] |  |
Net sales | $ (119,879) | $ (105,201)

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