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Fair Value Measurement Rollforward of Level 3 Contingent Consideration Liabilities (Details) - Recurring Basis - Level 3 - Estimate of Fair Value Measurement - Contingent Consideration Liability [Member] $ in Thousands	12 Months Ended
	Apr. 27, 2019 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition-related contingency consideration as of April 28, 2018	$ 1,000
Additions	1,739
Fair value adjustments (1)	286
Interest	88
Foreign currency translation	(48)
Acquisition-related contingency consideration as of April 27, 2019	$ 3,065

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