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ACCUMULATED OTHER COMPREHENSIVE LOSS, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward] |  |  |  |  |
Balance |  |  |  | $ 157,960 |
Other comprehensive (loss) income before reclassifications |  |  |  | (4,455) |
Amount reclassified from accumulated other comprehensive loss |  |  |  | 47 |
Net current period other comprehensive (loss) income |  | $ (1,117) | $ 3,504 | (4,408) | $ 10,931
Balance |  | 173,311 |  | 173,311 |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward] |  |  |  |  |
Balance |  |  |  | (19,625) |
Balance |  | (24,033) |  | (24,033) |
Foreign Currency Translation Adjustment [Member] |  |  |  |  |
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward] |  |  |  |  |
Balance |  |  |  | (16,537) |
Other comprehensive (loss) income before reclassifications |  |  |  | (4,463) |
Amount reclassified from accumulated other comprehensive loss |  |  |  | 0 |
Net current period other comprehensive (loss) income |  |  |  | (4,463) |
Balance |  | (21,000) |  | (21,000) |
Unrealized Holding Gains (Losses) on Available-for-Sale Securities [Member] |  |  |  |  |
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward] |  |  |  |  |
Balance |  |  |  | 145 |
Other comprehensive (loss) income before reclassifications |  |  |  | (31) |
Amount reclassified from accumulated other comprehensive loss |  |  |  | (170) |
Net current period other comprehensive (loss) income |  |  |  | (201) |
Balance |  | (56) |  | (56) |
Unfunded SERP Liability [Member] |  |  |  |  |
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward] |  |  |  |  |
Balance |  |  |  | (3,233) |
Other comprehensive (loss) income before reclassifications |  |  |  | 39 |
Amount reclassified from accumulated other comprehensive loss | [1] |  |  | 217 |
Net current period other comprehensive (loss) income |  |  |  | 256 |
Balance |  | $ (2,977) |  | $ (2,977) |
[1] | This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan. This expense is allocated between cost of sales and selling, general and administrative expense based upon the employment classification of the plan participants.

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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