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Financial Derivatives (Gain (Loss) On The Interest Rate Derivative Instruments) (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Interest Expense and Other Financing Costs [Member]
   
Derivative [Line Items]    
Gain (Loss) On Interest Rate Derivative Instruments $ 7 $ (2,621)
Designated Interest Rate Swaps [Member] | Other Comprehensive Income (Loss) [Member]
   
Derivative [Line Items]    
Gain (Loss) On Interest Rate Derivative Instruments 1,399 (3,660)
Non Designated Interest Rate Swaps [Member] | Interest Expense and Other Financing Costs [Member]
   
Derivative [Line Items]    
Gain (Loss) On Interest Rate Derivative Instruments 7 2,311
Non-designated interest rate swaps (reclassified from accumulated OCI) [Member] | Other Comprehensive Income (Loss) [Member]
   
Derivative [Line Items]    
Gain (Loss) On Interest Rate Derivative Instruments 0 2,984
Non-designated interest rate swaps (reclassified from accumulated OCI) [Member] | Interest Expense and Other Financing Costs [Member]
   
Derivative [Line Items]    
Gain (Loss) On Interest Rate Derivative Instruments $ 0 $ (4,932)