Fair Value of Financial Instruments (Details) (USD $)	0 Months Ended
	Mar. 31, 2013
Market valuation | Real estate loans
Financial Instruments Not Measured at Fair Value
Fixed market rate of interest (as a percent)	12.00%
Market valuation | Real estate loans | Minimum
Financial Instruments Not Measured at Fair Value
Variable market interest rate (as a percent)	12.00%
Market valuation | Real estate loans | Maximum
Financial Instruments Not Measured at Fair Value
Variable market interest rate (as a percent)	12.50%
Market valuation | Junior subordinated notes
Financial Instruments Not Measured at Fair Value
Market interest rate (as a percent)	6.38%
Market valuation | Mortgages Payable | Minimum
Financial Instruments Not Measured at Fair Value
Market interest rate (as a percent)	3.11%
Market valuation | Mortgages Payable | Maximum
Financial Instruments Not Measured at Fair Value
Market interest rate (as a percent)	17.00%
Estimated fair value | Real estate loans
Financial Instruments Not Measured at Fair Value
Estimated fair value greater than carrying value	$ 22,000
Estimated fair value | Junior subordinated notes
Financial Instruments Not Measured at Fair Value
Estimated fair value higher (lower) than carrying value	20,755,000
Estimated fair value | Mortgages Payable
Financial Instruments Not Measured at Fair Value
Estimated fair value higher (lower) than carrying value	$ 2,678,000