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NET SALES - Disaggregate sales by major source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of revenue:
Net sales	$ 78,375	$ 59,119
Boats and accessories
Disaggregation of revenue:
Net sales	77,259	58,222
Parts
Disaggregation of revenue:
Net sales	$ 1,116	$ 897

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