Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Net sales	$ 703,436	$ 647,080	$ 2,168,765	$ 2,105,043
Cost of goods sold	592,446	551,157	1,787,690	1,786,925
Gross margin	110,990	95,923	381,075	318,118
Selling, general and administrative expense	75,276	70,149	232,819	218,822
Impairment of long-lived assets			0	25,962
Restructuring and other expense	1,394	702	5,994	5,294
Operating income	34,320	25,072	142,262	68,040
Other income (expense):
Miscellaneous income, net	749	3,305	2,484	3,723
Interest expense	(7,674)	(7,886)	(23,202)	(23,539)
Equity in net income of unconsolidated affiliates	22,697	24,994	84,365	80,822
Earnings before income taxes	50,092	45,485	205,909	129,046
Income tax expense	11,141	11,342	48,555	34,157
Net earnings	38,951	34,143	157,354	94,889
Net earnings attributable to noncontrolling interests	3,062	4,296	9,333	9,698
Net earnings attributable to controlling interest	$ 35,889	$ 29,847	$ 148,021	$ 85,191
Basic
Average common shares outstanding	62,750	61,747	62,325	62,810
Earnings per share attributable to controlling interest	$ 0.57	$ 0.48	$ 2.37	$ 1.36
Diluted
Average common shares outstanding	64,977	63,871	64,758	64,923
Earnings per share attributable to controlling interest	$ 0.55	$ 0.47	$ 2.29	$ 1.31
Common shares outstanding at end of period	62,776	61,285	62,776	61,285
Cash dividends declared per share	$ 0.20	$ 0.19	$ 0.60	$ 0.57