NET SALES (Disaggregates sales by major source) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Disaggregation of Revenue [Line Items] | ||
| Net sales | $ 77,536 | $ 71,040 |
| Boats And Accessories | ||
| Disaggregation of Revenue [Line Items] | ||
| Net sales | 76,655 | 70,126 |
| Parts | ||
| Disaggregation of Revenue [Line Items] | ||
| Net sales | $ 881 | $ 914 |