Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 27, 2020	Dec. 29, 2019
Revenue from Contract with Customer [Abstract]
Contract with customer, asset, net, current	$ 284,418	$ 32,182
Contract assets - long term	77,002	14,777
Total	361,420	46,959
Deferred revenues recorded as liabilities	161,018	48,465
Contract liabilities - long term	18,163	10,051
Total	$ 179,181	$ 58,516