Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Net sales	$ 647,080	$ 804,785	$ 2,105,043	$ 2,538,211
Cost of goods sold	551,157	706,294	1,786,925	2,184,990
Gross margin	95,923	98,491	318,118	353,221
Selling, general and administrative expense	70,149	66,764	218,822	219,327
Impairment of goodwill and long-lived assets		81,600	25,962	97,785
Restructuring and other expense	702	2,177	5,294	2,765
Operating income (loss)	25,072	(52,050)	68,040	33,344
Other income (expense):
Miscellaneous income, net	3,305	213	3,723	1,756
Interest expense	(7,886)	(8,381)	(23,539)	(27,573)
Equity in net income of unconsolidated affiliates	24,994	18,800	80,822	69,043
Earnings (loss) before income taxes	45,485	(41,418)	129,046	76,570
Income tax expense (benefit)	11,613	(18,173)	35,121	19,540
Net earnings (loss)	33,872	(23,245)	93,925	57,030
Net earnings attributable to noncontrolling interests	4,296	2,465	9,698	9,110
Net earnings (loss) attributable to controlling interest	$ 29,576	$ (25,710)	$ 84,227	$ 47,920
Basic
Average common shares outstanding	61,747	66,359	62,810	67,013
Earnings (loss) per share attributable to controlling interest	$ 0.48	$ (0.39)	$ 1.34	$ 0.72
Diluted
Average common shares outstanding	63,727	66,359	64,583	69,301
Earnings (loss) per share attributable to controlling interest	$ 0.46	$ (0.39)	$ 1.30	$ 0.69
Common shares outstanding at end of period	61,285	65,078	61,285	65,078
Cash dividends declared per share	$ 0.19	$ 0.18	$ 0.57	$ 0.54