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FAIR VALUE MEASUREMENTS - Other Income From Available For Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 23, 2020	Sep. 25, 2019	Sep. 23, 2020	Sep. 25, 2019
Available-for-sale securities
Unrealized Gain (Loss) on Securities			$ (22)	$ 231
Total	$ 34	$ 248	335	1,259
Available-for-sale Securities
Available-for-sale securities
Dividend income	40	254	290	997
Realized gain (loss) on sale of investments	0	0	79	22
Unrealized Gain (Loss) on Securities	0	0	(22)	231
Total	$ 40	$ 254	$ 347	$ 1,250

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Amount of realized and unrealized gain (loss) on investment.

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