Leases - Lease cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 26, 2019	Oct. 26, 2019
Lease cost
Operating lease cost	$ 19,019	$ 38,037
Financing lease cost	50	99
Short-term lease cost	26	51
Variable lease cost	54	94
Less: Sublease income	(632)	(1,260)
Total lease cost	$ 18,517	$ 37,021

Amount of finance lease cost.

No definition available.

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- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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+ Details

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Period Type:	duration

- References

No definition available.

+ Details

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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-SubTopic 20
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+ Details

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Balance Type:	debit
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- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

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-Publisher FASB
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- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

+ References

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