Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Apr. 28, 2017	Apr. 29, 2016
Deferred tax assets:
Self-insurance	$ 2,306	$ 5,595
Stock and deferred compensation plans	14,034	12,582
Deferred proceeds on Mimi’s Café sale	0	3,564
Rebates, coupons and allowances	2,683	1,067
Inventory	2,234	2,605
Wage and related liabilities	2,511	3,426
Deferred gain from sale leaseback	769	22,306
Other	2,392	7,619
Total deferred tax assets before valuation allowances	26,929	58,764
Valuation allowance	(238)	(246)
Net deferred tax assets	26,691	58,518
Deferred tax liabilities:
Property, plant and equipment	19,988	28,111
Intangibles	1,217	747
Other	405	658
Total deferred tax liabilities	21,610	29,516
Net deferred tax assets (liabilities)	$ 5,081	$ 29,002