Real Estate - Portfolio (Remaining Funding Commitments) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 properties
Real Estate Investments, Net [Abstract]
Number of Properties with Funding Commitments	54
Total Commitment	$ 184,286	[1]
Amount Funded	146,715
Remaining Commitment	$ 37,571

[1] Includes land and construction costs.