Segment and Geographic Data - Information about Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	Apr. 24, 2021
Segment Reporting Information [Line Items]
Operating income	$ 275,971	$ 157,002	$ 210,607
Depreciation and amortization	83,704	81,992	76,549
Property and equipment, net	212,283	213,140
Total assets	2,879,146	2,741,630
United States
Segment Reporting Information [Line Items]
Property and equipment, net	177,163	200,839
United Kingdom
Segment Reporting Information [Line Items]
Property and equipment, net	21,033	6,045
Canada
Segment Reporting Information [Line Items]
Property and equipment, net	14,087	6,256
Dental
Segment Reporting Information [Line Items]
Operating income	237,268	180,212	201,244
Depreciation and amortization	14,051	13,495	7,774
Total assets	853,369	851,746
Animal Health
Segment Reporting Information [Line Items]
Operating income	126,994	114,403	88,123
Depreciation and amortization	44,644	44,561	45,771
Total assets	1,570,760	1,459,450
Corporate
Segment Reporting Information [Line Items]
Operating income	(88,291)	(137,613)	(78,760)
Depreciation and amortization	25,009	23,936	$ 23,004
Total assets	$ 455,017	$ 430,434