Leases - Lease cost (Details) $ in Thousands	12 Months Ended
	Mar. 28, 2020 USD ($)
Lease cost
Total finance lease cost	$ 1,590
Total lease cost	47,303
Cost of goods sold
Lease cost
Amortization of right-of-use assets	800
Operating lease cost	40,100
Sublease income	(177)
Selling, general and administrative expenses
Lease cost
Operating lease cost	1,530
Short-term lease cost	2,653
Variable lease cost	1,607
Interest expense
Lease cost
Interest on lease liabilities	$ 790