Restructuring Costs (Summary of Total Restructuring Charges) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 28, 2020	Mar. 27, 2021	Mar. 28, 2020	Mar. 30, 2019
Restructuring Cost and Reserve [Line Items]
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	$ 0
Other exit costs		222,000	1,903,000
Personnel-related charges, net of equity cancellations		0	483,000
Restructuring costs		352,000	21,925,000	$ 0
Accelerated depreciation			11,500,000
Recovery from equipment sold			1,900,000
Accrued restructuring charges	982,000	$ 0	982,000
Severance costs			1,700,000
Equity cancellation benefits			1,200,000
Other Accrued Liabilities | Accrued exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring charges	600,000		600,000
Other Accrued Liabilities | Accrued severance
Restructuring Cost and Reserve [Line Items]
Accrued restructuring charges	$ 400,000		$ 400,000