Consolidated Statements of Net Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Income Statement [Abstract]
Net Sales	$ 394,842	$ 387,616	$ 379,313
Cost of sales	170,820	172,973	199,067
Operating wage and fringe benefit expenses	39,964	42,189	41,717
Other operating expenses	58,402	52,387	49,381
Selling, general and administrative expenses	56,243	65,949	73,380
Depreciation and amortization expense	24,031	21,044	18,364
Impairments	15,256	0	2,761
Operating Income (Loss)	30,126	33,074	(5,357)
Net interest expense	9,216	10,427	8,649
Income (Loss) from Continuing Operations Before Income Taxes	20,910	22,647	(14,006)
Provision (Benefit) for income taxes	3,874	6,439	(8,626)
Income (Loss) from Continuing Operations	17,036	16,208	(5,380)
Income from Discontinued Operations, Net of Income Taxes	109,431	8,014	21,933
Net Income	$ 126,467	$ 24,222	$ 16,553
Earnings (Loss) Per Share - Income from Continuing Operations
Basic (in dollars per share)	$ 0.86	$ 0.76	$ (0.23)
Diluted (in dollars per share)	0.85	0.75	(0.23)
Earnings Per Share - Income from Discontinued Operations
Basic (in dollars per share)	5.51	0.38	0.93
Diluted (in dollars per share)	5.43	0.38	0.93
Earnings Per Share - Net Income
Basic (in dollars per share)	6.37	1.14	0.70
Diluted (in dollars per share)	6.28	1.13	0.70
Cash dividends per share (in dollars per share)	$ 1.36	$ 1.30	$ 1.24
Weighted Average Shares Outstanding
Basic (in shares)	19,839	21,336	23,489
Dilutive shares (in shares)	293	158	160
Diluted (in shares)	20,132	21,494	23,649