Leases - Supplemental Lease Disclosures (Details)	12 Months Ended
	Apr. 25, 2020 USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities, operating	$ 77,176,000
Cash paid for amounts included in the measurement of lease liabilities, financing	165,000
Lease liabilities arising from new ROU assets, operating	72,061,000
Lease liabilities arising from new ROU assets, financing	$ 0
Lease term and discount rate
Operating lease, Weighted-average remaining lease term (years)	7 years
Finance lease, Weighted-average remaining lease term (years)	3 months 18 days
Operating Lease, Weighted-average discount rate	3.90%
Finance lease, Weighted-average discount rate	3.90%