Notes Receivable and Allowance for Losses Summary Of Activity Related To Allowance For Losses (Details) $ in Thousands		6 Months Ended
		Jun. 30, 2015 USD ($)
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		$ 5,987
Ending balance		6,954
Forgivable Notes Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		3,661
Provisions		1,353
Recoveries		(383)
Write-offs		(330)
Other	[1]	387
Ending balance		4,688
Mezzanine & Other Notes Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance		2,326
Provisions		0
Recoveries		(60)
Write-offs		0
Other		0
Ending balance		$ 2,266

[1] Consists of default rate assumption changes