Real Estate - Portfolio (Remaining Funding Commitments) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012 properties
Real Estate Investments [Abstract]
Number of Properties with Funding Commitments	54
Total Commitment	$ 167,243	[1]
Amount Funded	127,693
Remaining Commitment	$ 39,550

[1] Includes land and construction costs.