Discontinued Operations - Reconciliation of Gain on Discontinued Operation (Details) - Restaurants Business - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds received from Restaurant Transaction	$ 539,301
Restaurants Business assets:
Accounts receivable	3,522
Inventory	8,538
Property, plant and equipment	480,663
Other assets	5,693
Total Restaurants Business assets	498,416
Restaurants Business liabilities:
Accounts payable	13,813
Accrued non income taxes	11,587
Accrued wages and benefits	8,794
Self-insurance reserves	8,003
Accrued gift cards	13,810
Accrued miscellaneous liabilities	12,455
Deferred sale leaseback gain	51,077
Other restaurant liabilities	7,039
Total Restaurants Business Liabilities	126,578
Other transaction costs incurred as part of the sale of the Restaurants Business (2)	17,296
Gain on sale of the Restaurants Business before income taxes	$ 150,167	$ 0	$ 0