Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Cash flows from operating activities:
Net income	$ 290,487	$ 215,990
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	154,412	150,146
Amortization of debt issuance costs	691	717
Share-based compensation	25,875	17,500
Loss (gain) on disposal of assets and impairment charges	4,791	(1,707)
Deferred income taxes	25,284	58,073
Changes in assets and liabilities:
Receivables	(49,463)	(8,087)
Inventories	3,023	(39,531)
Prepaid expenses	(9,875)	(13,698)
Accounts payable	(14,330)	87,831
Accrued expenses	6,224	(6,134)
Income taxes	46,707	(6,898)
Other, net	2,273	1,175
Net cash provided by operating activities	486,099	455,377
Cash flows from investing activities:
Purchase of property and equipment	(177,327)	(123,518)
Payments for acquisition of businesses, net of cash acquired	(2,692)	(626,126)
Proceeds from sales of assets	10,052	21,890
Net cash used in investing activities	(169,967)	(727,754)
Cash flows from financing activities:
Proceeds from long-term debt	0	300,000
Payments of long-term debt	(17,302)	(9,750)
Payments of debt issuance costs	0	(249)
Proceeds from exercise of stock options	0	133
Payments of cash dividends	(27,292)	(25,234)
Tax withholdings on employee share-based awards	(15,618)	(17,370)
Net cash (used in) provided by financing activities	(60,212)	247,530
Net increase (decrease) in cash and cash equivalents	255,920	(24,847)
Cash and cash equivalents at beginning of the period	158,878	336,545
Cash and cash equivalents at end of the period	414,798	311,698
Cash paid during the period for:
Interest, net of amount capitalized	25,077	25,076
Income taxes, net	17,696	14,937
Noncash investing and financing activities:
Purchased property and equipment in accounts payable	59,236	50,713
Right-of-use assets obtained in exchange for new finance lease liabilities	2,119	47,775
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1,163	$ 40,944