Revenue - Schedule of Revenues Disaggregated by Revenue Source and Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 333,637	$ 369,023	$ 733,998	$ 732,188
North America
Disaggregation Of Revenue [Line Items]
Revenues, net	227,525	255,644	511,232	505,656
Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	77,819	77,329	157,809	153,486
United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	19,737	24,525	44,765	49,136
Other
Disaggregation Of Revenue [Line Items]
Revenues, net	8,556	11,525	20,192	23,910
Digital Subscription Revenues
Disaggregation Of Revenue [Line Items]
Revenues, net	177,921	156,969	352,466	305,824
Digital Subscription Revenues | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	115,922	102,851	232,272	201,611
Digital Subscription Revenues | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	50,704	43,586	97,341	83,769
Digital Subscription Revenues | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	7,571	6,993	15,147	13,411
Digital Subscription Revenues | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	3,724	3,539	7,706	7,033
Studio + Digital Fees
Disaggregation Of Revenue [Line Items]
Revenues, net	115,076	156,799	265,188	314,670
Studio + Digital Fees | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	86,131	116,958	198,974	234,557
Studio + Digital Fees | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	17,858	23,681	39,377	47,630
Studio + Digital Fees | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	8,001	11,498	19,130	22,761
Studio + Digital Fees | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	3,086	4,662	7,707	9,722
Service Revenues, net
Disaggregation Of Revenue [Line Items]
Revenues, net	292,997	313,768	617,654	620,494
Service Revenues, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	202,053	219,809	431,246	436,168
Service Revenues, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	68,562	67,267	136,718	131,399
Service Revenues, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	15,572	18,491	34,277	36,172
Service Revenues, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	6,810	8,201	15,413	16,755
Product sales and other, net
Disaggregation Of Revenue [Line Items]
Revenues, net	40,640	55,255	116,344	111,694
Product sales and other, net | North America
Disaggregation Of Revenue [Line Items]
Revenues, net	25,472	35,835	79,986	69,488
Product sales and other, net | Continental Europe
Disaggregation Of Revenue [Line Items]
Revenues, net	9,257	10,062	21,091	22,087
Product sales and other, net | United Kingdom
Disaggregation Of Revenue [Line Items]
Revenues, net	4,165	6,034	10,488	12,964
Product sales and other, net | Other
Disaggregation Of Revenue [Line Items]
Revenues, net	$ 1,746	$ 3,324	$ 4,779	$ 7,155