Segment Reporting - Information about Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Apr. 29, 2023
Segment Reporting Information [Line Items]
Net sales	$ 1,576,745	$ 1,523,265
Operating income (loss)	38,222	34,844
Total assets	2,883,631		$ 2,879,146
Consumable
Segment Reporting Information [Line Items]
Net sales	1,315,725	1,261,769
Equipment
Segment Reporting Information [Line Items]
Net sales	163,971	173,935
Value-added services and other
Segment Reporting Information [Line Items]
Net sales	97,049	87,561
Dental
Segment Reporting Information [Line Items]
Net sales	567,300	557,917
Dental | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	38,670	36,895
Total assets	943,147		853,369
Dental | Consumable
Segment Reporting Information [Line Items]
Net sales	352,047	337,840
Dental | Equipment
Segment Reporting Information [Line Items]
Net sales	137,549	146,510
Dental | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	77,704	73,567
Animal Health
Segment Reporting Information [Line Items]
Net sales	1,010,990	960,370
Animal Health | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	29,693	21,859
Total assets	1,591,289		1,570,760
Animal Health | Consumable
Segment Reporting Information [Line Items]
Net sales	963,678	923,929
Animal Health | Equipment
Segment Reporting Information [Line Items]
Net sales	26,422	27,425
Animal Health | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	20,890	9,016
Corporate
Segment Reporting Information [Line Items]
Net sales	(1,545)	4,978
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	(30,141)	(23,910)
Total assets	349,195		$ 455,017
Corporate | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	(1,545)	4,978
United States
Segment Reporting Information [Line Items]
Net sales	1,291,371	1,260,398
United States | Dental
Segment Reporting Information [Line Items]
Net sales	510,250	499,835
United States | Animal Health
Segment Reporting Information [Line Items]
Net sales	782,666	755,585
United States | Corporate
Segment Reporting Information [Line Items]
Net sales	(1,545)	4,978
United Kingdom
Segment Reporting Information [Line Items]
Net sales	191,611	162,221
United Kingdom | Animal Health
Segment Reporting Information [Line Items]
Net sales	191,611	162,221
Canada
Segment Reporting Information [Line Items]
Net sales	93,763	100,646
Canada | Dental
Segment Reporting Information [Line Items]
Net sales	57,050	58,082
Canada | Animal Health
Segment Reporting Information [Line Items]
Net sales	$ 36,713	$ 42,564