Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Operating activities:
Net earnings	$ 741,450	$ 84,444	$ 163,273
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	87,654	92,678	95,602
Impairment of goodwill and long-lived assets	13,739	82,690	7,817
Provision for (benefit from) deferred income taxes	4,822	(1,309)	17,435
Bad debt expense (income)	(255)	580	659
Equity in net income of unconsolidated affiliates, net of distributions	(32,318)	8,106	7,347
Net (gain) loss on sale of assets	53,607	(5,057)	(7,059)
Stock-based compensation	19,129	11,883	11,733
Gains on investment in Nikola	(655,102)	0	0
Charitable contribution of Nikola shares	20,653	0	0
Loss on extinguishment of debt	0	4,034	0
Changes in assets and liabilities, net of impact of acquisitions:
Receivables	(223,254)	147,225	73,346
Inventories	(169,740)	62,126	(33,649)
Accounts payable	315,222	(142,685)	(93,294)
Accrued compensation and employee benefits	75,725	(11,878)	(19,159)
Income taxes payable	2,671	(215)	(3,429)
Other operating items, net	20,376	4,104	(22,763)
Net cash provided by operating activities	274,379	336,726	197,859
Investing activities:
Investment in property, plant and equipment	(82,178)	(95,503)	(84,499)
Proceeds from sale of Nikola shares	634,449	0	0
Acquisitions, net of cash acquired	(129,615)	(30,748)	(10,402)
Distributions from unconsolidated affiliate	0	0	56,693
Proceeds from sale of assets, net of selling costs	45,854	10,036	49,683
Net cash provided (used) by investing activities	468,510	(116,215)	11,475
Financing activities:
Proceeds from long-term debt, net of issuance costs	0	101,464	0
Principal payments on long-term debt	(622)	(154,913)	(1,394)
Proceeds from issuance of common shares, net of tax withholdings	6,581	(6,513)	(6,371)
Payments to noncontrolling interests	(10,690)	(1,453)	(10,726)
Repurchase of common shares	(192,054)	(50,972)	(168,113)
Dividends paid	(52,991)	(53,289)	(52,334)
Net cash used by financing activities	(249,776)	(165,676)	(238,938)
Increase (decrease) in cash and cash equivalents	493,113	54,835	(29,604)
Cash and cash equivalents at beginning of year	147,198	92,363	121,967
Cash and cash equivalents at end of year	$ 640,311	$ 147,198	$ 92,363