Income Taxes - Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 36,651	$ 46,074	$ 84,244
Gross increases in prior period tax positions	12,659	2,031	4,449
Gross increase from acquisition	13,717	0	0
Gross decreases in prior period tax positions	0	0	(55,752)
Gross increases in current period tax positions	11,758	4,152	16,987
Decreases related to settlements with tax authorities	0	(12,037)	(1,102)
Decreases from the expiration of statute of limitations	(6,962)	(3,569)	(2,752)
Balance at end of year	$ 67,823	$ 36,651	$ 46,074