Summary Of Significant Accounting Policies (Components Of Non-Cash Capital Expenditures) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Summary Of Significant Accounting Policies [Abstract]
Non-cash Capital Expenditures	$ 52,557	$ 111,947	$ 78,632	$ 20,231