Fair Value of Financial Instruments (Details) (Level 2, USD $)	3 Months Ended							0 Months Ended
	Dec. 31, 2013 Market valuation Real estate loans	Dec. 31, 2013 Market valuation Real estate loans Minimum	Dec. 31, 2013 Market valuation Real estate loans Maximum	Dec. 31, 2013 Market valuation Junior subordinated notes	Dec. 31, 2013 Market valuation Mortgages payable Minimum	Dec. 31, 2013 Market valuation Mortgages payable Maximum	Dec. 31, 2013 Estimated fair value Real estate loans	Dec. 31, 2013 Estimated fair value Junior subordinated notes	Dec. 31, 2013 Estimated fair value Mortgages payable
Financial Instruments Not Measured at Fair Value
Variable market interest rate (as a percent)		11.00%	12.00%
Fixed market rate of interest (as a percent)	11.00%
Estimated fair value lower than carrying value								$ (24,300,000)	$ (17,800,000)
Market interest rate (as a percent)				7.53%	2.42%	9.64%
Estimated fair value greater than carrying value							$ 16,000