Working Capital (Tables)

6 Months Ended

Nov. 30, 2011

Working Capital [Abstract]

Schedule Of Receivables

		November 30,			May 31,
In thousands		2011			2011
Trade notes and accounts receivable	$		81,616	$		84,406
Other			762			1,411
	$		82,378	$		85,817

Schedule Of Inventories

		November 30,			May 31,
In thousands		2011			2011
Finished products	$		8,384	$		9,627
Work in process			35,579			44,391
Raw materials			12,888			15,215
Total inventories at LIFO cost			56,851			69,233
Finished products			22,445			23,427
Raw materials			114			272
Parts and supplies			48,744			47,714
Total inventories at average cost			71,303			71,413
Total inventories	$		128,154	$		140,646

Accrued Interest, Compensation And Other

		November 30,			May 31,
In thousands		2011			2011
Interest	$		17,796	$		17,827
Compensation and employee benefits			16,116			13,536
Casualty insurance claims			12,129			15,740
Income taxes			3,814			3,723
Property taxes and other			13,974			8,022
	$		63,829	$		58,848