Income Taxes - Reconciliation (Details)	12 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 31, 2019
Effective income tax rate reconciliation
Statutory federal rate (as a percent)	21.00%	21.00%	21.00%
State taxes, net of federal benefit (as a percent)	3.40%	1.80%	(1.30%)
Non-deductible expenses (as a percent)	(1.20%)	(0.70%)	2.20%
Change in uncertain tax positions (as a percent)			2.80%
Change in valuation allowance (as a percent)	(7.60%)	(2.90%)
Rate change for loss carrybacks	6.20%	12.50%
Other (as a percent)	(0.70%)	0.70%
Effective rate (as a percent)	21.10%	32.40%	24.70%