Segment Reporting - Information about Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Apr. 30, 2022
Segment Reporting Information [Line Items]
Net sales	$ 1,523,265	$ 1,614,876
Operating income (loss)	34,844	(39,529)
Total assets	2,758,368		$ 2,741,630
Consumable
Segment Reporting Information [Line Items]
Net sales	1,261,769	1,341,674
Equipment and software
Segment Reporting Information [Line Items]
Net sales	173,935	183,452
Value-added services and other
Segment Reporting Information [Line Items]
Net sales	87,561	89,750
Dental
Segment Reporting Information [Line Items]
Net sales	557,917	606,867
Dental | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	36,895	(1,086)
Total assets	887,774		851,746
Dental | Consumable
Segment Reporting Information [Line Items]
Net sales	337,840	376,576
Dental | Equipment and software
Segment Reporting Information [Line Items]
Net sales	146,510	156,966
Dental | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	73,567	73,325
Animal Health
Segment Reporting Information [Line Items]
Net sales	960,370	1,002,790
Animal Health | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	21,859	23,805
Total assets	1,502,113		1,459,450
Animal Health | Consumable
Segment Reporting Information [Line Items]
Net sales	923,929	965,098
Animal Health | Equipment and software
Segment Reporting Information [Line Items]
Net sales	27,425	26,486
Animal Health | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	9,016	11,206
Corporate
Segment Reporting Information [Line Items]
Net sales	4,978	5,219
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	(23,910)	(62,248)
Total assets	368,481		$ 430,434
Corporate | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	4,978	5,219
United States
Segment Reporting Information [Line Items]
Net sales	1,260,398	1,313,772
United States | Dental
Segment Reporting Information [Line Items]
Net sales	499,835	541,073
United States | Animal Health
Segment Reporting Information [Line Items]
Net sales	755,585	767,480
United States | Corporate
Segment Reporting Information [Line Items]
Net sales	4,978	5,219
United Kingdom
Segment Reporting Information [Line Items]
Net sales	162,221	192,747
United Kingdom | Animal Health
Segment Reporting Information [Line Items]
Net sales	162,221	192,747
Canada
Segment Reporting Information [Line Items]
Net sales	100,646	108,357
Canada | Dental
Segment Reporting Information [Line Items]
Net sales	58,082	65,794
Canada | Animal Health
Segment Reporting Information [Line Items]
Net sales	$ 42,564	$ 42,563