Acquisitions (Details) $ in Thousands				6 Months Ended
	Oct. 25, 2021 USD ($)	Aug. 16, 2021 USD ($) store	Sep. 14, 2020 USD ($) store warehouse	Oct. 23, 2021 USD ($)	Oct. 24, 2020 USD ($)	Apr. 24, 2021 USD ($)
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired				$ 822
Goodwill				180,108		$ 175,814
Holdback payments for acquisition purchases				$ 13,500	$ 5,783
UK | Furnico | Subsequent Event
Business Acquisition [Line Items]
Consideration transferred	$ 11,500
Independently-owned Business | Long Island
Business Acquisition [Line Items]
Number of stores acquired | store		3
Consideration transferred		$ 4,500
Payments for asset acquisitions		4,400
Indefinite-lived intangible assets acquired		$ 800
Amortization period for tax purposes		15 years
Independently-owned Business | Seattle, Washington
Business Acquisition [Line Items]
Number of stores acquired | store			6
Number of warehouses acquired | warehouse			1
Consideration transferred			$ 13,500
Payments for asset acquisitions			2,000
Guaranteed future payments for asset acquisitions			9,400
Indefinite-lived intangible assets acquired			$ 2,200
Amortization period for tax purposes			15 years
Retail | Independently-owned Business | Long Island
Business Acquisition [Line Items]
Goodwill		$ 4,400
Retail | Independently-owned Business | Seattle, Washington
Business Acquisition [Line Items]
Goodwill			$ 12,900