REVENUE RECOGNITION - Change in Revenue Contract Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019
Movement in Contract with Customer, Liability [Roll Forward]
Balance, beginning of year	$ 41,770	$ 33,328
Revenue recognized	(32,816)	(57,074)
Cash received, excluding amounts recognized as revenue during the period	56,964	65,516
Balance, end of year	$ 65,918	$ 41,770