Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Lessee, Lease, Description [Line Items]
Rent expense	$ 90,630	$ 68,860
Rent expense			$ 65,181
Right-of-use assets obtained in exchange for lease obligations, operating leases	20,356	$ 30,573
eOne Acquisition
Lessee, Lease, Description [Line Items]
Right-of-use assets obtained in exchange for lease obligations, operating leases	$ 88,819
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	18 years