DISCONTINUED OPERATIONS - Statement of Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 23, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Expenses:        
Gain on sale of partnership interest   $ 15,467 $ 0 $ 0
Newark Joint Venture | Disposal Group, Disposed of by Sale, Not Discontinued Operations        
Revenues:        
Rental and other revenue from real estate properties   2,437 4,335  
Other income   444 1,067  
Total revenues   2,881 5,402  
Expenses:        
Real estate operating expenses   2,277 4,610  
Interest expense   2,242 4,880  
Depreciation   1,150 2,241  
Total expense   5,669 11,731  
Income from discontinued operations   (2,788) (6,329)  
Gain on sale of partnership interest $ 15,467 15,467 0  
Discontinued operations   $ 12,679 $ (6,329)