Income Taxes Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 28, 2017	Jan. 30, 2016
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 758	$ 454	$ 2,087	$ 4,687
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 4,519	$ (3,149)	$ 7,221	$ 7,567
Effective Income Tax Rate Reconciliation, Percent	16.80%	(14.40%)	28.90%	61.90%