Notes Receivable and Allowance for Losses Summary Of Activity Related To Allowance For Losses (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 5,987
Ending balance	6,808
Forgivable Notes Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	3,661
Provisions	1,471
Recoveries	(498)
Write-offs	(511)
Other	448	[1]
Ending balance	4,571
Mezzanine & Other Notes Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	2,326
Provisions	0
Recoveries	(89)
Write-offs	0
Other	0
Ending balance	$ 2,237

[1] Consists of default rate assumption changes