Business Combinations - Narrative (Details) $ in Thousands, $ in Millions	3 Months Ended				6 Months Ended
	Oct. 31, 2024 USD ($)	Jul. 31, 2024 USD ($)	Oct. 31, 2023 USD ($)	Jul. 31, 2023 USD ($)	Oct. 31, 2024 USD ($)	Oct. 31, 2023 USD ($)	Aug. 26, 2024 USD ($) location	Jul. 02, 2024 USD ($) location	Jul. 02, 2024 CAD ($) location
Business Acquisition [Line Items]
Net sales	$ 1,470,776		$ 1,420,930		$ 2,919,232	$ 2,830,530
Net income	53,536	$ 57,248	80,957	$ 86,830	110,784	167,787
Transaction costs (acquisitions and other)	1,193		$ 1,223		2,473	$ 2,608
Yvon
Business Acquisition [Line Items]
Number of locations | location								7	7
Contingent consideration arrangement term								5 years	5 years
Yvon | Maximum
Business Acquisition [Line Items]
Contingent consideration								$ 33,500	$ 46.0
R.S. Elliott Specialty Supply
Business Acquisition [Line Items]
Number of locations | location							5
Fiscal 2025 Acquisitions
Business Acquisition [Line Items]
Net sales					64,400
Net income					400
Goodwill not expected to be deductible for income tax purposes	37,800				37,800
Goodwill expected to be deductible for income tax purposes	44,900				44,900
Trade accounts and notes receivable	51,755				51,755		$ 51,721
Trade accounts and notes receivable, gross	$ 52,000				$ 52,000