Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash flows from operating activities:
Net income	$ 215,990	$ 232,575
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	150,146	130,114
Amortization of debt issuance costs	717	0
Share-based compensation	17,500	14,492
(Gain) loss on disposal of assets and impairment charges	(1,707)	2,159
Deferred income taxes	58,073	15,607
Changes in assets and liabilities:
Receivables	(8,087)	(7,609)
Inventories	(39,531)	(13,835)
Prepaid expenses	(13,698)	(8,381)
Accounts payable	87,831	125,719
Accrued expenses	(6,134)	39,177
Income taxes	(6,898)	22,924
Other, net	1,175	(985)
Net cash provided by operating activities	455,377	551,957
Cash flows from investing activities:
Purchase of property and equipment	(123,518)	(158,815)
Payments for acquisition of businesses, net of cash acquired	(626,126)	0
Proceeds from sales of assets	21,890	2,667
Net cash used in investing activities	(727,754)	(156,148)
Cash flows from financing activities:
Proceeds from long-term debt	300,000	650,000
Payments of long-term debt	(9,750)	(570,738)
Payments of debt issuance costs	(249)	0
Net payments of short-term debt	0	(120,000)
Proceeds from exercise of stock options	133	1,253
Proceeds from capital grant	0	1,594
Payments of cash dividends	(25,234)	(23,591)
Tax withholdings on employee share-based awards	(17,370)	(7,917)
Net cash provided by (used in) financing activities	247,530	(69,399)
Net (decrease) increase in cash and cash equivalents	(24,847)	326,410
Cash and cash equivalents at beginning of the period	336,545	78,275
Cash and cash equivalents at end of the period	311,698	404,685
Cash paid during the period for:
Interest, net of amount capitalized	25,076	26,535
Income taxes, net	14,937	31,956
Noncash investing and financing activities:
Purchased property and equipment in accounts payable	50,713	18,471
Right-of-use assets obtained in exchange for new finance lease liabilities	47,775	0
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 40,944	$ 1,109