Marketable Securities (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 24, 2022	Mar. 26, 2022
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	$ 2,747	$ 2,325
Amortized cost on available for sale securities held at gross unrealized loss	72,400	75,500
Securities in a continuous unrealized loss position for more than 12 months, amortized cost	56,200	3,500
Securities in a continuous unrealized loss position for more than 12 months, aggregate unrealized loss	$ 2,300	$ 100
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