NET SALES (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 189,398	$ 161,957	$ 587,812	$ 491,592
In-ground Swimming Pools
Disaggregation of Revenue [Line Items]
Net sales	102,334	84,060	326,290	285,704
Covers
Disaggregation of Revenue [Line Items]
Net sales	51,934	44,125	122,848	94,354
Liners
Disaggregation of Revenue [Line Items]
Net sales	$ 35,130	$ 33,772	$ 138,674	$ 111,534

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details