Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Cash flows from operating activities:
Net income	$ 276,079	$ 332,991	$ 273,442
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	133,362	126,907	119,232
Write-off and amortization of debt discount and debt issuance costs	4,704	1,468	2,744
Equity-based compensation	22,436	22,098	17,354
Gain on disposal of assets	(729)	(1,413)	(913)
Deferred income taxes	3,685	220	(351)
Other items, net	8,766	13,270	5,706
Changes in assets and liabilities net of effects of acquisitions:
Trade accounts and notes receivable	(26,573)	(37,024)	(162,118)
Inventories	17,067	(16,802)	(156,311)
Prepaid expenses and other assets	(18,652)	1,367	(92)
Accounts payable	22,147	6,665	28,423
Accrued compensation and employee benefits	5,795	11,754	32,564
Other accrued expenses and liabilities	(14,838)	(19,764)	19,931
Cash provided by operating activities	433,249	441,737	179,611
Cash flows from investing activities:
Purchases of property and equipment	(57,247)	(52,672)	(41,082)
Proceeds from sale of assets	2,668	2,879	1,922
Acquisition of businesses, net of cash acquired	(376,192)	(61,677)	(348,050)
Cash used in investing activities	(430,771)	(111,470)	(387,210)
Cash flows from financing activities:
Repayments on revolving credit facility	(605,409)	(647,247)	(1,178,897)
Borrowings from revolving credit facility	765,373	546,113	1,390,222
Payments of principal on long-term debt	(2,500)	(5,110)	(5,110)
Payments of principal on finance lease obligations	(41,786)	(35,845)	(31,365)
Borrowings from term loan amendments	390,574	0	0
Repayments of term loan amendments	(390,076)	0	0
Repurchases of common stock	(116,439)	(110,776)	(35,488)
Payment of acquisition holdback liability	0	(13,500)	0
Debt issuance costs	(7,070)	(3,157)	0
Proceeds from exercises of stock options	6,336	4,715	4,434
Payments for taxes related to net share settlement of equity awards	(4,026)	(4,005)	(2,850)
Proceeds from issuance of stock pursuant to employee stock purchase plan	4,586	3,203	2,332
Cash (used in) provided by financing activities	(437)	(265,609)	143,278
Effect of exchange rates on cash and cash equivalents	(638)	(1,829)	(775)
Increase (decrease) in cash and cash equivalents	1,403	62,829	(65,096)
Cash and cash equivalents, beginning of year	164,745	101,916	167,012
Cash and cash equivalents, end of year	166,148	164,745	101,916
Supplemental cash flow disclosures:
Cash paid for income taxes	120,352	110,366	86,288
Cash paid for interest	$ 70,798	$ 61,752	$ 46,204