Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Operating activities
Net earnings (loss)	$ 33,872	$ (23,245)	$ 93,925	$ 57,030
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization	20,761	21,762	62,748	63,329
Impairment of goodwill and long-lived assets		81,600	25,962	97,785
Provision for (benefit from) deferred income taxes	9,322	(35,334)	(6,069)	(41,361)
Bad debt expense (income)	187	(46)	195	(106)
Equity in net income of unconsolidated affiliates, net of distributions	(622)	(571)	(16,524)	(8,374)
Net (gain) loss on sale of assets	(3,385)	3,047	(7,633)	3,481
Stock-based compensation	3,627	4,058	11,284	12,911
Excess tax benefits - stock-based compensation	(431)	(663)	(1,689)	(6,416)
Changes in assets and liabilities, net of impact of acquisitions:
Receivables	10,688	5,078	76,791	10,914
Inventories	37,211	(8,795)	61,032	(43,925)
Prepaid expenses and other current assets	(19,309)	(3,078)	9,324	(11,182)
Other assets	(1,216)	2,415	(4,019)	5,631
Accounts payable and accrued expenses	14,027	40,260	(16,500)	10,055
Other liabilities	1,052	(3,612)	5,352	(10,108)
Net cash provided by operating activities	105,784	82,876	294,179	139,664
Investing activities
Investment in property, plant and equipment	(14,973)	(26,119)	(75,465)	(73,265)
Investment in notes receivable				(7,300)
Acquisitions, net of cash acquired	(31,256)	(54,389)	(34,206)	(105,482)
Investments in unconsolidated affiliates, net of distributions	(3,683)	(4,559)	(5,596)	(8,230)
Proceeds from sale of assets and insurance	431	3,521	9,887	3,813
Net cash used by investing activities	(49,481)	(81,546)	(105,380)	(190,464)
Financing activities
Net proceeds from (repayments of) short-term borrowings	(16,716)	112,285	(57,728)	112,644
Proceeds from long-term debt		5,916	921	26,396
Principal payments on long-term debt	(216)	(101,832)	(644)	(102,645)
Proceeds from issuance of common shares	2,747	2,081	5,811	1,627
Excess tax benefits - stock-based compensation	431	663	1,689	6,416
Payments to noncontrolling interests	(4,206)	(9,200)	(9,106)	(12,067)
Repurchase of common shares	(28,352)	(52,795)	(99,848)	(94,415)
Dividends paid	(11,913)	(12,517)	(35,529)	(34,767)
Net cash used by financing activities	(58,225)	(55,399)	(194,434)	(96,811)
Decrease in cash and cash equivalents	(1,922)	(54,069)	(5,635)	(147,611)
Cash and cash equivalents at beginning of period	27,354	96,537	31,067	190,079
Cash and cash equivalents at end of period	$ 25,432	$ 42,468	$ 25,432	$ 42,468