Leases - Supplemental Lease Disclosures (Details) $ in Thousands	3 Months Ended
Jul. 27, 2019 USD ($)
Leases
Cash paid for amounts included in the measurement of lease liabilities, operating	$ 19,303
Cash paid for amounts included in the measurement of lease liabilities, financing	49
Lease liabilities arising from new ROU assets, operating	$ 14,353
Lease term and discount rate
Operating lease, Weighted-average remaining lease term (years)	6 years 7 months 6 days
Finance lease, Weighted-average remaining lease term (years)	9 months 18 days
Operating Lease, Weighted-average discount rate	3.90%
Finance lease, Weighted-average discount rate	3.90%

Amount of cash outflow for principal payment on finance lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
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- Definition

Weighted average discount rate for finance lease calculated at point in time.

+ References

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- References

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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