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Property and Equipment, net (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Sep. 30, 2015
Property, Plant and Equipment [Line Items]    
Financing obligation, current $ 823 $ 737
Buildings and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Buildings and building improvements $ 45,816 45,816
Buildings and Building Improvements [Member] | Orlando Florida Campus    
Property, Plant and Equipment [Line Items]    
Financing obligation, current   $ 0