Investments in Marketable Securities and Unconsolidated Entities - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2015	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Gain (Loss) on Sale of Investments					$ (1,800,000)	$ (500,000)
Change in unrealized loss related to available-for-sale securities	$ 0	$ 1,070,000	$ 0	$ 1,276,000
Equity Method Investments, Impairment Of Unconsolidated Entity Investments, Continuing Operations	0	$ 0	0	$ 0
Financial Guarantee
Schedule of Equity Method Investments [Line Items]
Guarantor Obligations, Current Carrying Value	0		0			0
Inspirada
Schedule of Equity Method Investments [Line Items]
Settlement of unconsolidated entity debt obligation						$ 3,300,000
Joint Venture Obligation	$ 1,100,000		$ 1,100,000