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NET SALES - Disaggregate sales by major source (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of revenue:
Net sales	$ 239,825	$ 292,136	$ 298,616
Boats and accessories
Disaggregation of revenue:
Net sales	235,097	287,837	294,537
Parts
Disaggregation of revenue:
Net sales	$ 4,728	$ 4,299	$ 4,079

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