CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013
Net sales	$ 871,012	$ 769,900	$ 1,733,426	$ 1,462,191
Cost of goods sold	745,789	641,668	1,478,696	1,222,995
Gross margin	125,223	128,232	254,730	239,196
Selling, general and administrative expense	77,308	78,395	152,563	149,935
Impairment of long-lived assets	14,235	30,734	16,185	35,375
Restructuring and other expense (income)	405	(1,182)	398	(5,179)
Joint venture transactions	83	786	190	928
Operating income	33,192	19,499	85,394	58,137
Other income (expense):
Miscellaneous income	1,220	2,472	1,543	13,409
Interest expense	(9,676)	(6,258)	(19,192)	(12,498)
Equity in net income of unconsolidated affiliates	22,319	21,086	50,243	48,037
Earnings before income taxes	47,055	36,799	117,988	107,085
Income tax expense	15,600	8,459	37,713	22,392
Net earnings	31,455	28,340	80,275	84,693
Net earnings attributable to noncontrolling interest	1,993	5,363	6,645	7,159
Net earnings attributable to controlling interest	$ 29,462	$ 22,977	$ 73,630	$ 77,534
Basic
Average common shares outstanding	67,105	69,304	67,337	69,454
Earnings per share attributable to controlling interest	$ 0.44	$ 0.33	$ 1.09	$ 1.12
Diluted
Average common shares outstanding	69,181	71,826	69,780	72,089
Earnings per share attributable to controlling interest	$ 0.43	$ 0.32	$ 1.06	$ 1.08
Common shares outstanding at end of period	66,912	69,138	66,912	69,138
Cash dividends declared per share	$ 0.18	$ 0.15	$ 0.36	$ 0.30