Supplementary Information Supplementary Info - Impairment and Restructuring (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Other Nonrecurring Expense	$ 57,748	$ 313,130	$ 0
Goodwill, Impairment Loss	49,282	313,130
Other Asset Impairment Charges	8,466
Restructuring and other charges	7,233	5,429	$ 1,790
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	2,274
Write off of Deferred Debt Issuance Cost	118
Employee Severance [Member]
Restructuring and other charges	4,554
Facility Closing [Member]
Restructuring and other charges	281
Other Restructuring [Member]
Restructuring and other charges	2,054
Other Expense [Member]
Other Nonrecurring Expense	2,679
Patrick Maloney [Member]
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 2,500
Max Roberts [Member]
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 5,429