Debt (Tables)

12 Months Ended

Sep. 30, 2012

Debt Disclosure [Abstract]

Composition of Long Term Debt

Long-term debt comprises the following at September 30:

	2012			2011
Senior Notes:
6.375%, due September 2013	$	108,000		$	108,000
5.75%, due September 2016	175,000			175,000
6.21%, due September 2036	100,000			100,000
Medium-Term Notes:
5.53%, due September 2012	—			40,000
5.37%, due August 2013	25,000			25,000
5.16%, due May 2015	20,000			20,000
7.37%, due October 2015	22,000			22,000
5.64%, due December 2015	50,000			50,000
6.17%, due June 2017	20,000			20,000
7.25%, due November 2017	20,000			20,000
5.67%, due January 2018	20,000			20,000
6.50%, due August 2033	20,000			20,000
6.13%, due October 2034	20,000			20,000
Total long-term debt	600,000			640,000
Less: current maturities	(133,000		)	(40,000		)
Total long-term debt due after one year	$	467,000		$	600,000