4. Debt Summary Of Maturities And Percentage Of Redemption Price Of Unsecured Notes (Details) (Unsecured Notes due 2021 [Member])	Sep. 30, 2013
2016
Debt Instrument [Line Items]
Redemption Price	104.406%
2017
Debt Instrument [Line Items]
Redemption Price	102.938%
2018
Debt Instrument [Line Items]
Redemption Price	101.469%
2019 and thereafter
Debt Instrument [Line Items]
Redemption Price	100.00%