Segment Reporting - Information about Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jul. 27, 2024	Jul. 29, 2023	Apr. 27, 2024
Segment Reporting Information [Line Items]
Net sales	$ 1,541,742	$ 1,576,745
Operating income (loss)	29,369	38,222
Total assets	2,874,758		$ 2,896,732
Consumable
Segment Reporting Information [Line Items]
Net sales	1,278,413	1,315,725
Equipment
Segment Reporting Information [Line Items]
Net sales	159,286	163,971
Value-added services and other
Segment Reporting Information [Line Items]
Net sales	104,043	97,049
Dental
Segment Reporting Information [Line Items]
Net sales	550,357	567,300
Dental | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	27,058	38,670
Total assets	911,350		913,478
Dental | Consumable
Segment Reporting Information [Line Items]
Net sales	344,117	352,047
Dental | Equipment
Segment Reporting Information [Line Items]
Net sales	133,858	137,549
Dental | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	72,382	77,704
Animal Health
Segment Reporting Information [Line Items]
Net sales	982,413	1,010,990
Animal Health | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	25,367	29,693
Total assets	1,611,533		1,568,413
Animal Health | Consumable
Segment Reporting Information [Line Items]
Net sales	934,296	963,678
Animal Health | Equipment
Segment Reporting Information [Line Items]
Net sales	25,428	26,422
Animal Health | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	22,689	20,890
Corporate
Segment Reporting Information [Line Items]
Net sales	8,972	(1,545)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	(23,056)	(30,141)
Total assets	351,875		$ 414,841
Corporate | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	8,972	(1,545)
United States
Segment Reporting Information [Line Items]
Net sales	1,261,866	1,291,371
United States | Dental
Segment Reporting Information [Line Items]
Net sales	498,957	510,250
United States | Animal Health
Segment Reporting Information [Line Items]
Net sales	753,937	782,666
United States | Corporate
Segment Reporting Information [Line Items]
Net sales	8,972	(1,545)
United Kingdom
Segment Reporting Information [Line Items]
Net sales	195,046	191,611
United Kingdom | Animal Health
Segment Reporting Information [Line Items]
Net sales	195,046	191,611
Canada
Segment Reporting Information [Line Items]
Net sales	84,830	93,763
Canada | Dental
Segment Reporting Information [Line Items]
Net sales	51,400	57,050
Canada | Animal Health
Segment Reporting Information [Line Items]
Net sales	$ 33,430	$ 36,713