Long-Term Debt (Tables)

6 Months Ended

Mar. 31, 2012

Long-Term Debt [Abstract]

Summary Of Long-Term Debt

	March 31, 2012		September 30, 2011
Senior Notes, bearing fixed interest at 6.5% per annum	$	450,000	$	—
2011 credit facility, bearing interest (market adjustable) at approximately 3.3% per annum at March 31, 2012 and 3.1% per annum at September 30, 2011.		150,000		520,000
	$	600,000	$	520,000