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Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Sep. 30, 2016
Debt [Abstract]    
Long-term Debt, Excluding Current Maturities $ 29,376 $ 29,257
Revolving Credit Facility [Member]    
Line Of Credit Facility [Line Items]    
Line Of Credit Facility Interest Rate At Period End 2.99% 2.76%
Letters of Credit Outstanding, Amount $ 6,634  
Excess Availability $ 40,686