Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Cash flows from operating activities
Net income	$ 339,790	$ 312,900	$ 263,846
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	303,541	265,195	251,174
Amortization of debt issuance costs	2,527	1,603	0
Stock-based compensation	37,976	31,986	18,129
(Gain) loss on disposal of assets and impairment charges	(1,201)	9,680	3,495
Deferred income taxes	82,721	4,123	49,810
Changes in assets and liabilities:
Receivables	(33,025)	(26,278)	(10,644)
Inventories	(76,730)	(50,342)	37,713
Prepaid expenses	(6,376)	(1,413)	(2,308)
Accounts payable	165,893	166,546	(140,151)
Accrued expenses	23,574	65,497	26,400
Income taxes	(35,716)	5,714	15,783
Other, net	(14,233)	18,877	(8,933)
Net cash provided by operating activities	788,741	804,088	504,314
Cash flows from investing activities
Purchase of property and equipment	(326,475)	(441,252)	(438,977)
Payments for acquisitions of businesses, net of cash acquired	(901,638)	(9,356)	(32,706)
Proceeds from sales of property and equipment	70,118	6,268	5,041
Net cash used in investing activities	(1,157,995)	(444,340)	(466,642)
Cash flows from financing activities
Proceeds from long-term debt	450,000	650,000	0
Repayments of long-term debt	(188,537)	(571,661)	(17,476)
Net (payments) borrowings of short-term debt	0	(120,000)	45,000
Payment of debt issuance costs	(1,149)	(5,525)	0
Proceeds from exercise of stock options	133	1,784	2,958
Payments of cash dividends	(51,212)	(47,971)	(45,951)
Tax withholdings on employee stock-based awards	(17,648)	(8,105)	(7,224)
Net cash provided by (used in) financing activities	191,587	(101,478)	(22,693)
Net (decrease) increase in cash and cash equivalents	(177,667)	258,270	14,979
Cash and cash equivalents at beginning of year	336,545	78,275	63,296
Cash and cash equivalents at end of year	158,878	336,545	78,275
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION
Cash paid during the year for interest, net of amount capitalized	54,499	48,508	54,277
Cash paid for income taxes, net	49,565	80,916	9,364
Noncash investing and financing activities
Noncash additions from adoption of ASC 842	0	0	22,635
Purchased property and equipment in accounts payable	$ 46,659	$ 9,204	$ 5,328