Restructuring Costs (Summary of Total Restructuring Charges) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 28, 2020	Mar. 26, 2022	Mar. 27, 2021	Mar. 28, 2020
Restructuring and Related Activities [Abstract]
Disposal of equipment, net of recovery from sales	$ 9,600,000		$ 130,000	$ 9,578,000
Impairment and write-off of intangible assets	$ 10,000,000	$ 0	0	9,961,000
Other exit costs			222,000	1,903,000
Personnel-related charges, net of equity cancellations			0	483,000
Restructuring costs		$ 0	$ 352,000	21,925,000
Accelerated depreciation				11,500,000
Recovery from equipment sold				1,900,000
Severance costs				1,700,000
Equity cancellation benefits				$ 1,200,000