XML 40 R26.htm IDEA: XBRL DOCUMENT v3.4.0.3
Summary Of Significant Accounting Policies (Components Of Other Current Assets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Sep. 30, 2015
Summary Of Significant Accounting Policies [Line Items]    
Prepayments $ 5,923 $ 10,743
Prepaid Property and Other Taxes 21,757 13,709
Fair Values of Firm Commitments 12,941 15,775
Regulatory Assets 16,093 20,438
Other Current Assets $ 56,714 $ 60,665