Summary Of Significant Accounting Policies (Schedule Of Other Significant Noncash Transactions) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary Of Significant Accounting Policies [Abstract]
Non-Cash Capital Expenditure, Non-Cash Investing Activity	$ 86,144	$ 154,960	$ 67,503	$ 125,115