Long-Term Debt and Credit Arrangements - Schedule of Net Interest Expense (Details) - USD ($) $ in Thousands		3 Months Ended
Jul. 29, 2016	Jul. 29, 2016	Jul. 24, 2015
Debt Instrument [Line Items]
Capitalized interest		$ (198)	$ (11)
Total Interest Expense on outstanding borrowings		2,569	3,221
Accretion on note receivable		(558)	(499)
Other		(118)	(116)
Total Interest Income		(676)	(615)
Net Interest Expense		(1,893)	(2,606)
Mimi's Cafe
Debt Instrument [Line Items]
Sale note receivable	$ 30,000
Variable-Rate Debt
Debt Instrument [Line Items]
Interest expense, debt		2,371	2,795
Fixed-Rate Debt
Debt Instrument [Line Items]
Interest expense, debt		$ 396	$ 437

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