Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 29, 2017	Apr. 30, 2016	Apr. 25, 2015
Operating Leases
Total rent liability	$ 14,000	$ 14,800
Future minimum rentals for all non-cancelable operating leases
2018	68,898
2019	62,782
2020	56,027
2021	52,093
2022	41,615
2023 and beyond	103,143
Total Future Minimum Rentals	384,558
Future rental income from subleases
2018	3,195
2019	3,195
2020	3,211
2021	2,562
2022	879
2023 and beyond	1,350
Total Future Minimum Income	14,392
Rental expense and rental income for operating leases
Rental expense	68,452	62,953	$ 55,808
Rental income	$ 3,604	$ 4,650	$ 4,966

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Amount of minimum sublease rentals to be received maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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No definition available.

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Amount of minimum sublease rentals to be received maturing in the fourth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of minimum sublease rentals to be received maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of minimum sublease rentals to be received maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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No definition available.

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Amount of minimum sublease rentals to be received maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms excess of one year.

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No definition available.

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Amount of minimum sublease rentals to be received maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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No definition available.

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for contractual rent under lease arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Contractually required future rental payments receivable on noncancelable subleasing arrangements.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

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The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases.

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