Condensed Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 30, 2014	Aug. 31, 2013
Operating activities:
Net income including noncontrolling interest	$ 28,185	$ 8,898
Depreciation and amortization	9,123	8,893
Other adjustments, net	649	(26,157)
Net cash provided by (used in) operating activities	37,957	(8,366)
Investing activities:
Purchase of investments	(43,709)	(13,181)
Sales of investments	41,926	29,200
Investment in Southwest Specialty, LLC	(3,010)
Purchases of property, plant and equipment	(20,524)	(11,455)
Payments received on notes receivable and from affiliates	745	3,726
Net proceeds from disposal of property, plant and equipment	86	22
Net cash provided by (used in) investing activities	(24,486)	8,312
Financing activities:
Proceeds from issuance of common stock from treasury, net (including tax benefit on nonqualifying disposition of incentive stock options)	60	219
Distributions to noncontrolling interests	(429)
Principal payments on long-term debt	(2,625)	(2,726)
Payments of dividends	(10,446)
Net cash used in financing activities	(13,440)	(2,507)
Net change in cash and cash equivalents	31	(2,561)
Cash and cash equivalents at beginning of period	14,521	24,984
Cash and cash equivalents at end of period	$ 14,552	$ 22,423