Other Assets Property Loans (Details) (Avistar Portfolio [Member], Series C [Member], USD $)	3 Months Ended
	Mar. 31, 2013
Avistar Portfolio [Member] | Series C [Member]
Available-for-sale Securities, at Par Value	$ 804,000
Debt Instrument, Interest Rate, Stated Percentage	9.00%
Available-for-sale Security, Maturity Date at a point in time	Apr. 01, 2050