Debt Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Debt Obligations
Total debt obligations	$ 554,017	$ 493,464
Mortgages payable
Debt Obligations
Total debt obligations	516,617	456,064
Junior subordinated notes
Debt Obligations
Total debt obligations	$ 37,400	$ 37,400