Income Taxes Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 26, 2019	Oct. 31, 2020	Oct. 26, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ (1,694)	$ 19,054	$ (16,610)	$ 4,865
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	$ 5,821	$ 54,985	$ (55,747)	$ 8,641
Effective Income Tax Rate Reconciliation, Percent	(29.10%)	34.70%	29.80%	56.30%