Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Net sales	$ 871,266	$ 727,780	$ 1,719,503	$ 1,465,329
Cost of goods sold	731,187	604,977	1,446,646	1,195,244
Gross margin	140,079	122,803	272,857	270,085
Selling, general and administrative expense	89,425	76,487	177,674	157,543
Impairment of goodwill and long-lived assets	8,289		8,289
Restructuring and other expense (income), net	(9,694)	3,272	(7,390)	4,600
Operating income	52,059	43,044	94,284	107,942
Other income (expense):
Miscellaneous income, net	1,321	872	1,669	1,735
Interest expense	(10,038)	(7,658)	(18,845)	(15,528)
Equity in net income of unconsolidated affiliates	16,445	27,124	43,751	61,668
Earnings before income taxes	59,787	63,382	120,859	155,817
Income tax expense	18,165	13,515	31,163	37,414
Net earnings	41,622	49,867	89,696	118,403
Net earnings attributable to noncontrolling interests	2,219	3,302	4,759	6,271
Net earnings attributable to controlling interest	$ 39,403	$ 46,565	$ 84,937	$ 112,132
Basic
Average common shares outstanding	61,503	62,348	61,976	62,115
Earnings per share attributable to controlling interest	$ 0.64	$ 0.75	$ 1.37	$ 1.81
Diluted
Average common shares outstanding	63,468	64,725	64,044	64,599
Earnings per share attributable to controlling interest	$ 0.62	$ 0.72	$ 1.33	$ 1.74
Common shares outstanding at end of period	60,755	62,562	60,755	62,562
Cash dividends declared per share	$ 0.21	$ 0.20	$ 0.42	$ 0.40