Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023
Cash flows from operating activities:
Net income	$ 361,116	$ 328,019
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	191,001	168,503
Amortization of debt issuance costs	555	555
Change in excess replacement cost over LIFO inventory valuation	6,398	7,946
Share-based compensation	23,645	19,485
Loss (gain) on disposal of assets and impairment charges	4,422	(232)
Deferred income taxes	12,054	39,353
Changes in assets and liabilities:
Receivables	(855)	(21,897)
Inventories	(8,723)	(44,714)
Prepaid and other current assets	(12,505)	(10,693)
Accounts payable	(9,902)	(10,400)
Accrued expenses	(36,228)	(20,925)
Income taxes	20,780	21,992
Other, net	299	4,788
Net cash provided by operating activities	552,057	481,780
Cash flows from investing activities:
Purchase of property and equipment	(211,226)	(175,955)
Payments for acquisition of businesses, net of cash acquired	(46,341)	(139,359)
Proceeds from sales of assets	11,720	8,291
Net cash used in investing activities	(245,847)	(307,023)
Cash flows from financing activities:
Proceeds from long-term debt	1,100,000	0
Payments of long-term debt and finance lease obligations	(34,637)	(35,135)
Payments of Debt Issuance Costs	5,191	0
Payments of cash dividends	(35,179)	(30,988)
Repurchase of common stock and payment of related excise taxes	(734)	(59,491)
Tax withholdings on employee share-based awards	(25,110)	(18,121)
Net cash provided by (used) in financing activities	999,149	(143,735)
Net increase in cash, cash equivalents and restricted cash	1,305,359	31,022
Cash and cash equivalents at beginning of the period	206,482	378,869
Cash, cash equivalents and restricted cash at end of the period	1,511,841	409,891
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	351,723	409,891
Restricted cash (see Note 9)	1,160,118	0
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	1,511,841	409,891
Cash paid during the period for:
Interest, net of amount capitalized	33,516	31,429
Income taxes, net	82,507	36,037
Noncash investing and financing activities:
Purchased property and equipment in accounts payable	59,312	78,684
Right-of-use assets obtained in exchange for new finance lease liabilities	11,210	11,216
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 0	$ 8,273