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Revenue - Schedule of Revenues Disaggregated by Revenue Source and Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 297,761	$ 331,796
North America
Disaggregation Of Revenue [Line Items]
Revenues, net	204,313	221,315
Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	70,902	81,896
United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	14,439	19,067
Other
Disaggregation Of Revenue [Line Items]
Revenues, net	8,107	9,518
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net	191,482	206,062
Digital Subscription Revenues | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	125,319	132,090
Digital Subscription Revenues | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	53,475	58,915
Digital Subscription Revenues | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	7,805	9,809
Digital Subscription Revenues | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	4,883	5,248
Workshops + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net	65,503	73,758
Workshops + Digital Fees | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	50,980	54,904
Workshops + Digital Fees | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	8,222	10,940
Workshops + Digital Fees | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	4,422	5,169
Workshops + Digital Fees | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	1,879	2,745
Subscription Revenues, net
Disaggregation Of Revenue [Line Items]
Revenues, net	256,985	279,820
Subscription Revenues, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	176,299	186,994
Subscription Revenues, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	61,697	69,855
Subscription Revenues, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	12,227	14,978
Subscription Revenues, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	6,762	7,993
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net	40,776	51,976
Product sales and other, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	28,014	34,321
Product sales and other, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	9,205	12,041
Product sales and other, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	2,212	4,089
Product sales and other, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 1,345	$ 1,525

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