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Derivative Financial Instruments - Narrative (Details) (USD $)
3 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Jun. 30, 2013
Dec. 01, 2012
Derivative [Line Items]        
Derivative Instruments, Percentage Designated As Cash Flow Hedges     90.00%  
Derivative, Nonmonetary Notional Amount   $ 0    
Loss on Cash Flow Hedge Ineffectiveness 500,000      
Losses recognized in OCI   0    
Restricted cash 6,260,000   8,084,000  
Notional amount on interest rate swap transaction     10,000,000 10,000,000
Fixed interest rate required to be paid per the swap transaction     0.48%  
Net losses to be reclassified into earnings within the next twelve months     8,200,000  
Derivative Instruments, Percentage Excluded from Effectiveness Testing 10.00%      
Cash Flow Hedging [Member]
       
Derivative [Line Items]        
Derivative, Nonmonetary Notional Amount 47,900,000      
Losses recognized in OCI $ (3,125,000) $ 0