Long-Term Debt and Credit Arrangements - Schedule of Net Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 28, 2016	Oct. 23, 2015	Oct. 28, 2016	Oct. 23, 2015
Debt Instrument [Line Items]
Capitalized interest	$ (116)	$ (39)	$ (314)	$ (50)
Total Interest Expense on outstanding borrowings	2,434	3,513	5,003	6,733
Accretion on note receivable	(574)	(513)	(1,133)	(1,011)
Other	(119)	(117)	(237)	(233)
Total Interest Income	(693)	(630)	(1,370)	(1,244)
Net Interest Expense	1,741	2,883	3,633	5,489
Write off of deferred debt issuance cost		480
Mimi's Cafe
Debt Instrument [Line Items]
Sale note receivable			30,000
Variable-Rate Debt
Debt Instrument [Line Items]
Interest expense, debt	2,247	2,614	4,617	5,408
Fixed-Rate Debt
Debt Instrument [Line Items]
Interest expense, debt	$ 303	$ 938	$ 700	$ 1,375