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Investment in Unconsolidated Affiliate - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]        
Carrying value $ 4,494 $ 4,338 $ 4,206 $ 4,000
Ownership Percentage       28.00%
Equity in earnings of unconsolidated affiliate 0 399 385  
Other (expense) income, net        
Schedule of Equity Method Investments [Line Items]        
Equity in earnings of unconsolidated affiliate   399 $ 400  
Education services and facilities        
Schedule of Equity Method Investments [Line Items]        
Equity in earnings of unconsolidated affiliate 417      
Investment in JV        
Schedule of Equity Method Investments [Line Items]        
Carrying value $ 4,494 $ 4,338    
Ownership Percentage 28.00% 28.00%