Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2017
Operating activities:
Net earnings	$ 163,273	$ 200,850	$ 217,937
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	95,602	103,359	86,793
Impairment of goodwill and long-lived assets	7,817	61,208
Provision for (benefit from) deferred income taxes	17,435	(38,237)	18,443
Bad debt expense	659	11	269
Equity in net income of unconsolidated affiliates, net of distributions	7,347	(13,352)	(8,023)
Net (gain) loss on assets	(7,059)	(10,522)	7,951
Stock-based compensation	11,733	13,758	14,349
Changes in assets and liabilities, net of impact of acquisitions:
Receivables	73,346	(53,066)	(39,927)
Inventories	(33,649)	(84,654)	(34,599)
Prepaid expenses and other current assets	(24,284)	(12,402)	985
Other assets	3,325	(1,258)	1,905
Accounts payable and accrued expenses	(116,875)	105,984	67,492
Other liabilities	(811)	9,666	2,097
Net cash provided by operating activities	197,859	281,345	335,672
Investing activities:
Investment in property, plant and equipment	(84,499)	(76,088)	(68,386)
Acquisitions, net of cash acquired	(10,402)	(285,028)
Distributions from unconsolidated affiliate	56,693	2,400
Proceeds from sale of assets	49,683	21,311	5,422
Net cash provided (used) by investing activities	11,475	(337,405)	(62,964)
Financing activities:
Net repayments of short-term borrowings, net of issuance costs		(948)	(2,528)
Proceeds from long-term debt, net of issuance costs		197,685
Principal payments on long-term debt	(1,394)	(31,130)	(874)
Proceeds from issuance of common shares, net of tax withholdings	(6,371)	(2,120)	(9,075)
Payments to noncontrolling interests	(10,726)	(7,915)	(15,622)
Repurchase of common shares	(168,113)	(204,267)
Dividends paid	(52,334)	(51,359)	(50,716)
Net cash used by financing activities	(238,938)	(100,054)	(78,815)
Increase (decrease) in cash and cash equivalents	(29,604)	(156,114)	193,893
Cash and cash equivalents at beginning of year	121,967	278,081	84,188
Cash and cash equivalents at end of year	$ 92,363	$ 121,967	$ 278,081