CONSOLIDATED STATEMENTS OF NET INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 22, 2016	Jan. 23, 2015	Jan. 22, 2016	Jan. 23, 2015
Income Statement [Abstract]
Net Sales	$ 346,505	$ 357,177	$ 993,239	$ 1,016,796
Cost of sales	118,581	124,544	317,611	354,723
Operating wage and fringe benefit expenses	106,607	109,116	315,894	319,158
Other operating expenses	53,592	54,804	161,407	162,713
Selling, general and administrative expenses	29,005	38,965	99,366	100,353
Depreciation and amortization expense	19,856	20,403	60,116	59,851
Impairments	804	1,672	1,089	3,249
Operating Income	18,060	7,673	37,756	16,749
Net interest expense	2,367	2,406	7,856	6,225
Income Before Income Taxes	15,693	5,267	29,900	10,524
Provision (Benefit) for income taxes	2,762	(653)	6,258	(419)
Net Income	$ 12,931	$ 5,920	$ 23,642	$ 10,943
Earnings Per Share — Net Income
Basic (in dollars per share)	$ 0.62	$ 0.25	$ 1.08	$ 0.47
Diluted (in dollars per share)	0.62	0.25	1.08	0.46
Cash Dividends Paid Per Share (in dollars per share)	$ 0.34	$ 0.31	$ 0.96	$ 0.93
Weighted Average Shares Outstanding
Basic (in shares)	20,692	23,515	21,845	23,487
Dilutive shares (in shares)	111	231	144	230
Diluted (in shares)	20,803	23,746	21,989	23,717