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Revenue - Schedule of Revenues Disaggregated by Revenue Source (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 293,497	$ 320,699	$ 936,672	$ 1,054,697
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net	195,288	188,731	606,687	541,197
Workshops + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net	67,113	93,579	208,405	358,767
Subscription
Disaggregation Of Revenue [Line Items]
Revenues, net	262,401	282,310	815,092	899,964
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 31,096	$ 38,389	$ 121,580	$ 154,733

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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.

+ References

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