CONSOLIDATED STATEMENTS OF NET INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 29, 2016	Jul. 24, 2015
Income Statement [Abstract]
Net Sales	$ 306,317	$ 321,713
Cost of sales	93,250	96,322
Operating wage and fringe benefit expenses	100,698	104,959
Other operating expenses	55,642	51,589
Selling, general and administrative expenses	25,455	40,428
Depreciation and amortization expense	17,574	20,153
Operating Income	13,698	8,262
Net interest expense	1,893	2,606
Income Before Income Taxes	11,805	5,656
Provision (Benefit) for income taxes	2,643	1,376
Net Income	$ 9,162	$ 4,280
Earnings Per Share — Net Income
Basic (in dollars per share)	$ 0.46	$ 0.19
Diluted (in dollars per share)	0.46	0.19
Cash Dividends Paid Per Share (in dollars per share)	$ 0.34	$ 0.31
Weighted Average Shares Outstanding
Basic (in shares)	19,792	22,733
Dilutive shares (in shares)	172	148
Diluted (in shares)	19,964	22,881