Marketable Securities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 24, 2023	Mar. 25, 2023
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	$ 1,918	$ 1,997
Amortized cost on available for sale securities held at gross unrealized loss	73,100	64,000
Securities in a continuous unrealized loss position for more than 12 months, amortized cost	47,000	56,300
Securities in a continuous unrealized loss position for more than 12 months, aggregate unrealized loss	$ 1,600	$ 1,900
Minimum
Debt Securities, Available-for-sale [Line Items]
Maturity period for highly-rated securities	1 year
Maximum
Debt Securities, Available-for-sale [Line Items]
Maturity period for highly-rated securities	3 years