Summary of Significant Accounting Policies and Other Information - Cash and cash equivalents (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020	Dec. 28, 2019
Accounting Policies [Abstract]
Cash and cash equivalents	$ 572,771	$ 687,525	$ 620,575
Restricted cash included in prepaid expenses and other current assets	3,462	0	0
Restricted cash included in other assets	1,064	0	0
Total cash, cash equivalents and restricted cash	$ 577,297	$ 687,525	$ 620,575	$ 531,139