SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Allowance for doubtful accounts, deducted from accounts receivable
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	$ 1,956	$ 2,563	$ 3,145
Acquisitions	600
Charged/(Credited) to Costs and Expenses	367	261	(278)
Charged/(Credited) to Other Accounts	0
Deductions	(743)	(868)	(304)
Balance at End of Year	2,180	1,956	2,563
Allowance for deferred tax assets
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	1,224	1,786	3,625
Acquisitions	0
Charged/(Credited) to Costs and Expenses	740
Charged/(Credited) to Other Accounts	506	(299)	(562)
Deductions	(158)	(263)	(1,277)
Balance at End of Year	$ 2,312	$ 1,224	$ 1,786