Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT LONG-TERM DEBT - Loss Recognized on Derivatives (Details)

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LONG-TERM DEBT LONG-TERM DEBT - Loss Recognized on Derivatives (Details) - Cash Flow Hedging - Interest Rate Swaps - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Other Comprehensive Income (Loss)    
Debt Instrument [Line Items]    
Amount of Loss Recognized in AOCI on Derivatives $ (3,230) $ (4,841)
Interest Expense    
Debt Instrument [Line Items]    
Amount of Loss Recognized in Income on Derivatives (3,146) (3,922)
Amount of Loss Reclassified from AOCI into Income(Effective Portion) $ (1,919) $ (2,392)