Residential Real Estate (Details) (USD $)			3 Months Ended	9 Months Ended			9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Residential real estate	Sep. 30, 2013 Residential real estate	Sep. 30, 2013 Residential real estate Building	Sep. 30, 2013 Residential real estate Land	Sep. 30, 2013 Residential real estate Furniture and fixtures	Sep. 30, 2013 Residential real estate Development Assets
Other Investments
Costs incurred for getting properties ready for intended use			$ 9,700,000	$ 31,300,000
Depreciable Life					30 years		5 years
Acquisition Cost			514,485,000	514,485,000	173,554,000	49,706,000	167,000	291,058,000
Cost Capitalized Subsequent to Acquisition			36,728,000	36,728,000	19,909,000		616,000	16,203,000
Accumulated Depreciation			3,191,000	3,191,000	3,086,000		105,000
Net Book Value	$ 548,022,000	$ 99,115,000	$ 548,022,000	$ 548,022,000	$ 190,377,000	$ 49,706,000	$ 678,000	$ 307,261,000