Commitments And Contingencies (Tables)

3 Months Ended

May 31, 2012

Commitments And Contingencies [Abstract]

Undiscounted Environmental Remediation Liability

Environmental Remediation Liabilities
$ in thousands	May 31,		May 31,		August 31,
Balance Sheet Location	2012		2011		2011
Other current liabilities	$	2,559	$	1,518	$	1,540
Other noncurrent liabilities		5,200		-		-
Total environmental remediation liabilities	$	7,759	$	1,518	$	1,540