Income Taxes Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 25, 2020	Jan. 26, 2019	Jan. 25, 2020	Jan. 26, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ (3,182)	$ (294)	$ 1,683	$ 2,680
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	$ (4,875)	$ 475	$ 3,766	$ 24,524
Effective Income Tax Rate Reconciliation, Percent	65.30%	(61.90%)	44.70%	10.90%