Investments in Marketable Securities and Unconsolidated Entities - Narrative (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Change in unrealized loss related to available-for-sale securities	$ 0		$ 206,000
Gain (Loss) on Sale of Investments		$ (1,800,000)		$ (500,000)
Equity Method Investments, Impairment Of Unconsolidated Entity Investments, Continuing Operations	0
Financial Guarantee
Schedule of Equity Method Investments [Line Items]
Guarantor Obligations, Current Carrying Value	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