CONSOLIDATED STATEMENTS OF NET INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 23, 2015	Oct. 24, 2014	Oct. 23, 2015	Oct. 24, 2014
Income Statement [Abstract]
Net Sales	$ 325,021	$ 333,279	$ 646,734	$ 659,619
Cost of sales	102,709	116,012	199,030	230,180
Operating wage and fringe benefit expenses	104,403	105,613	209,287	210,042
Other operating expenses	56,181	54,195	107,815	107,909
Selling, general and administrative expenses	29,902	28,972	70,361	61,387
Depreciation and amortization expense	20,107	19,475	40,260	39,448
Impairments	285	0	285	1,577
Operating Income	11,434	9,012	19,696	9,076
Net interest expense	2,883	2,203	5,489	3,819
Income Before Income Taxes	8,551	6,809	14,207	5,257
Provision for income taxes	2,120	770	3,496	234
Net Income	$ 6,431	$ 6,039	$ 10,711	$ 5,023
Earnings Per Share — Net Income
Basic (in dollars per share)	$ 0.29	$ 0.26	$ 0.48	$ 0.21
Diluted (in dollars per share)	0.29	0.25	0.47	0.21
Cash Dividends Paid Per Share (in dollars per share)	$ 0.31	$ 0.31	$ 0.62	$ 0.62
Weighted Average Shares Outstanding
Basic (in shares)	22,115	23,509	22,421	23,467
Dilutive shares (in shares)	118	226	151	231
Diluted (in shares)	22,233	23,735	22,572	23,698