Goodwill and Other Intangible Assets - Intangible Assets (Details) $ in Thousands	6 Months Ended
	Oct. 27, 2018 USD ($)
Roll-forward of other intangible assets
Balance at beginning of period	$ 18,190
Acquisitions	13,000
Amortization	(404)
Translation adjustment	(286)
Balance at end of period	30,500
Trade Names
Roll-forward of other intangible assets
Acquisitions	6,400
Amortization	(200)
Balance at end of period	6,200
Other Intangible Assets
Roll-forward of other intangible assets
Balance at beginning of period	3,390
Amortization	(204)
Translation adjustment	(229)
Balance at end of period	2,957
Trade Names
Roll-forward of other intangible assets
Balance at beginning of period	1,155
Balance at end of period	1,155
Reacquired Rights
Roll-forward of other intangible assets
Balance at beginning of period	13,645
Acquisitions	6,600
Translation adjustment	(57)
Balance at end of period	$ 20,188