Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Nov. 30, 2013		Nov. 30, 2012		Nov. 30, 2013		Nov. 30, 2012
NET SALES	$ 208,892		$ 167,693		$ 441,974		$ 342,216
Cost of products sold	194,735		155,939		397,151		315,262
GROSS PROFIT	14,157		11,754		44,823		26,954
Selling, general and administrative	19,655		17,067		38,207		34,623
Interest expense	17,423		7,457		34,794		15,235
Other income, net	(5,406)		(1,924)		(11,263)		(4,525)
LOSS BEFORE INCOME TAXES FROM CONTINUING OPERATIONS	(17,515)		(10,846)		(16,915)		(18,379)
Income taxes (benefit)	125		(657)		295		(796)
NET LOSS FROM CONTINUING OPERATIONS	(17,640)		(10,189)		(17,210)		(17,583)
NET INCOME (LOSS) FROM DISCONTINUED OPERATIONS	0		(933)		0		3,805
NET LOSS	$ (17,640)		$ (11,122)		$ (17,210)		$ (13,778)
NET LOSS PER SHARE FROM CONTINUING OPERATIONS:
Basic (in USD per share)	$ (0.62)		$ (0.36)		$ (0.60)		$ (0.63)
Diluted (in USD per share)	$ (0.62)		$ (0.36)		$ (0.60)		$ (0.63)
NET INCOME (LOSS) PER SHARE FROM DISCONTINUED OPERATIONS:
Basic (in USD per share)	$ 0.00		$ (0.04)		$ 0.00		$ 0.14
Diluted (in USD per share)	$ 0.00		$ (0.04)		$ 0.00		$ 0.14
NET LOSS PER SHARE:
Basic (in USD per share)	$ (0.62)		$ (0.40)		$ (0.60)		$ (0.49)
Diluted (in USD per share)	$ (0.62)		$ (0.40)		$ (0.60)		$ (0.49)
AVERAGE SHARES OUTSTANDING
Basic (in shares)	28,614		28,030		28,596		28,014
Diluted (in shares)	28,614	[1]	28,030	[1]	28,596	[1]	28,014	[1]

[1] Shares excluded due to antidilutive effect of stock options, restricted shares and awards