Consolidated Statements of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Net sales	$ 773,230	$ 619,527	$ 2,235,421	$ 1,908,184
Cost of goods sold	650,743	522,501	1,873,738	1,622,651
Gross margin	122,487	97,026	361,683	285,533
Selling, general and administrative expense	75,680	63,221	225,615	187,744
Impairment of long-lived assets			35,375	1,520
Restructuring and other expense (income)	1,398	146	(3,781)	1,811
Joint venture transactions	120	253	1,048	(1,188)
Operating income	45,289	33,406	103,426	95,646
Other income (expense):
Miscellaneous income	488	596	13,897	1,064
Interest expense	(6,196)	(6,158)	(18,694)	(17,751)
Equity in net income of unconsolidated affiliates	21,186	25,716	69,223	73,580
Earnings before income taxes	60,767	53,560	167,852	152,539
Income tax expense	16,556	16,229	38,948	47,721
Net earnings	44,211	37,331	128,904	104,818
Net earnings attributable to noncontrolling interest	3,608	200	10,767	1,899
Net earnings attributable to controlling interest	$ 40,603	$ 37,131	$ 118,137	$ 102,919
Basic
Average common shares outstanding	68,895	69,791	69,268	68,998
Earnings per share attributable to controlling interest	$ 0.59	$ 0.53	$ 1.71	$ 1.49
Diluted
Average common shares outstanding	71,528	71,914	71,910	70,501
Earnings per share attributable to controlling interest	$ 0.57	$ 0.52	$ 1.64	$ 1.46
Common shares outstanding at end of period	68,302	70,168	68,302	70,168
Cash dividends declared per share	$ 0.15	$ 0.26	$ 0.45	$ 0.52