Schedule II - Valuation and Qualifying Accounts, Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Year	$ 3,170	$ 3,170	$ 3,200
Additions	79	0	0
Deductions	10	0	30
End of Year	3,239	3,170	3,170
Valuation allowance for deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Year	118,773	101,383	72,520
Additions	34,488	17,390	28,863
Deductions	2,354	0	0
End of Year	$ 150,907	$ 118,773	$ 101,383