Credit Facility - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 27, 2019	Jul. 28, 2018	Apr. 27, 2019
Line of Credit Facility [Line Items]
Line Of Credit Potential Increase Amount	$ 100,000
Proceeds from Lines of Credit	120,300	$ 96,300
Repayments of Lines of Credit	79,700	62,500
Loans Payable to Bank		230,200
Letters of Credit Outstanding, Amount		4,759
Long-term Line of Credit, Noncurrent	74,100	130,200	$ 33,500
Short-term Debt	100,000	$ 100,000	$ 100,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 500,000
New Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit Facility Maturity Term	5 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 400,000
FILO [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 100,000