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Investment in Unconsolidated Affiliate Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2013
Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]          
Equity in earnings of unconsolidated affiliate $ 385 $ 484 $ 342    
Equity Method Investments 4,206 4,112 $ 4,036 $ 4,000 $ 4,000
Equity Method Investment, Ownership Percentage         28.00%
Investment in JV [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investments $ 4,206 $ 4,112      
Equity Method Investment, Ownership Percentage 27.972% 27.972%