Consolidated Statements of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
Net sales	$ 692,291	$ 666,035
Cost of goods sold	581,327	572,384
Gross margin	110,964	93,651
Selling, general and administrative expense	71,540	59,422
Impairment of long-lived assets	4,641	1,570
Restructuring and other expense (income)	(3,997)	403
Joint venture transactions	142	(1,162)
Operating income	38,638	33,418
Other income (expense):
Miscellaneous income	10,937	165
Interest expense	(6,240)	(5,259)
Equity in net income of unconsolidated affiliates	26,951	22,643
Earnings before income taxes	70,286	50,967
Income tax expense	13,933	16,102
Net earnings	56,353	34,865
Net earnings attributable to noncontrolling interest	1,796	903
Net earnings attributable to controlling interest	$ 54,557	$ 33,962
Basic
Average common shares outstanding	69,601	68,278
Earnings per share attributable to controlling interest	$ 0.78	$ 0.50
Diluted
Average common shares outstanding	72,083	69,571
Earnings per share attributable to controlling interest	$ 0.76	$ 0.49
Common shares outstanding at end of period	69,373	68,679
Cash dividends declared per share	$ 0.15	$ 0.13