Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Net sales	$ 727,780	$ 699,816	$ 1,465,329	$ 1,457,963
Cost of goods sold	604,977	590,637	1,195,244	1,235,768
Gross margin	122,803	109,179	270,085	222,195
Selling, general and administrative expense	76,487	72,722	157,543	148,673
Impairment of long-lived assets		22,962	0	25,962
Restructuring and other expense	3,272	1,523	4,600	4,592
Operating income	43,044	11,972	107,942	42,968
Other income (expense):
Miscellaneous income, net	872	996	1,735	418
Interest expense	(7,658)	(7,799)	(15,528)	(15,653)
Equity in net income of unconsolidated affiliates	27,124	29,247	61,668	55,828
Earnings before income taxes	63,382	34,416	155,817	83,561
Income tax expense	13,515	8,665	37,414	22,815
Net earnings	49,867	25,751	118,403	60,746
Net earnings attributable to noncontrolling interests	3,302	2,375	6,271	5,402
Net earnings attributable to controlling interest	$ 46,565	$ 23,376	$ 112,132	$ 55,344
Basic
Average common shares outstanding	62,348	62,676	62,115	63,338
Earnings per share attributable to controlling interest	$ 0.75	$ 0.37	$ 1.81	$ 0.87
Diluted
Average common shares outstanding	64,725	64,663	64,599	65,350
Earnings per share attributable to controlling interest	$ 0.72	$ 0.36	$ 1.74	$ 0.85
Common shares outstanding at end of period	62,562	62,101	62,562	62,101
Cash dividends declared per share	$ 0.20	$ 0.19	$ 0.40	$ 0.38