Marketable Securities (Tables)

12 Months Ended

Dec. 25, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule Of Marketable Securities

			Gross		Gross
(amounts in thousands)	Amortized		Unrealized		Unrealized		Fair
December 25, 2021	Cost		Holding Gains		Holding Losses		Value
Available-for-sale:
Level 1
Equity securities							$	6,509
Level 2
Corporate and municipal bonds	$	151,947	$	4,753	$	(2,384)		154,315
Commercial Paper		44,931		2		(13)		44,920
	$	196,878	$	4,755	$	(2,397)	$	205,744

			Gross		Gross
(amounts in thousands)	Amortized		Unrealized		Unrealized		Fair
December 26, 2020	Cost		Holding Gains		Holding Losses		Value
Available-for-sale:
Level 1
Equity securities							$	7,410
Level 2
Corporate and municipal bonds	$	99,861	$	5,723	$	(1,139)		104,445
	$	99,861	$	5,723	$	(1,139)	$	111,855

Schedule Of Maturities Of Marketable Securities

	Amortized		Fair
(amounts in thousands)	Cost		Value
Available-for-sale:
Due within one year	$	48,596	$	48,610
Due after one year through five years		97,438		98,897
Due after five years through ten years		50,844		51,728
	$	196,878	$	199,235