STOCKHOLDER'S EQUITY (Details) - USD ($)		1 Months Ended	12 Months Ended
	Apr. 21, 2020	Aug. 31, 2019	Dec. 30, 2020	Dec. 25, 2019	Dec. 26, 2018
Class of Stock [Line Items]
LLC interests acquired (in shares)				4,412,150
Effect of GTC Merger (in shares)		2,690,263		2,690,263
Share-based Payment Arrangement, Option
Class of Stock [Line Items]
LLC interests acquired (in shares)			456,942	484,319	300,696
Class A Common Stock | ATM Program
Class of Stock [Line Items]
Sale of stock, maximum offering price	$ 75,000
Sale of stock, number of shares issued in transaction (in shares)	233,467
Proceeds from sale of stock	$ 9,794
Class A Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	3,416,070
Proceeds from sale of stock	$ 135,857