Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Operating activities:
Net earnings	$ 19,505	$ 113,185	$ 84,749	$ 254,660
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Depreciation and amortization	28,354	21,090	56,355	43,154
Impairment of long-lived assets			312
Provision for (benefit from) deferred income taxes	(3,617)	1,309	(14,673)	2,675
Bad debt expense	1,098	335	1,440	514
Equity in net income of unconsolidated affiliates, net of distributions	18,352	(31,274)	61,197	(64,492)
Net gain on sale of assets	(4,265)	(496)	(5,034)	(13,202)
Stock-based compensation	4,547	4,248	8,783	7,551
Changes in assets and liabilities, net of impact of acquisitions:
Receivables	119,674	(89,817)	157,093	(121,685)
Inventories	72,293	(97,182)	113,460	(260,864)
Accounts payable	(100,535)	(47,594)	(202,116)	(926)
Accrued compensation and employee benefits	3,336	14,358	(30,532)	(31,819)
Income taxes payable	(7,629)	(22,922)	(300)	12,935
Other operating items, net	(18,172)	15,656	(16,755)	2,583
Net cash provided (used) by operating activities	132,941	(119,104)	213,979	(168,916)
Investing activities:
Investment in property, plant and equipment	(24,490)	(24,234)	(45,967)	(48,159)
Investment in non-marketable equity securities	(140)		(250)
Acquisitions, net of cash acquired		(3,000)	(56,088)	(107,750)
Proceeds from sale of investment in ArtiFlex			36,095
Proceeds from sale of assets, net of selling costs	23,739	5,136	35,494	31,821
Net cash used by investing activities	(891)	(22,098)	(30,716)	(124,088)
Financing activities:
Net repayments of short-term borrowings	(10,619)		(43,062)
Principal payments on long-term obligations	(13)	(10)	(150)	(402)
Payments for issuance of common shares, net of tax withholdings	(649)	(2,694)	(4,115)	(6,785)
Payments to noncontrolling interests	(11,760)	(2,879)	(11,760)	(12,076)
Repurchase of common shares		(12,702)		(73,587)
Dividends paid	(15,181)	(14,565)	(29,065)	(29,263)
Net cash used by financing activities	(38,222)	(32,850)	(88,152)	(122,113)
Increase (decrease) in cash and cash equivalents	93,828	(174,052)	95,111	(415,117)
Cash and cash equivalents at beginning of period	35,768	399,246	34,485	640,311
Cash and cash equivalents at end of period	$ 129,596	$ 225,194	$ 129,596	$ 225,194