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FAIR VALUE MEASUREMENTS - Schedule of AFS Sold (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2020	Dec. 25, 2019	Dec. 26, 2018
Equity securities:
Gross proceeds from sales and redemptions		$ 20,000	$ 27,000	$ 2,144
Cost basis of sales and redemptions		19,921	26,978	2,160
Gross realized gains included in net income (loss)		79	36	2
Gross realized losses included in net income (loss)		0	(14)	(18)
Amounts reclassified out of accumulated other comprehensive loss	[1]	$ 0	$ 0	$ 16
[1] Net of tax benefit of $0 for fiscal years ended December 30, 2020, December 25, 2019 and December 26, 2018.

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