Investments in Marketable Securities and Unconsolidated Entities - Income (Loss), Impairments From, and Equity In Investments In Unconsolidated Entities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule of Equity Method Investments [Line Items]
Equity in income (loss) of unconsolidated entities	$ 153	$ (81)	$ 377	$ 221