Debt and Preferred Equity Investments (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012 segment
Investments, Debt and Equity Securities [Abstract]
Number of portfolio segments of financial receivables (segment)	1	1
Additional amount of financing receivables included in other assets	$ 172,800,000	$ 121,300,000
Unpaid Principal Balance
With no related allowance recorded	0	0
With an allowance recorded	10,750,000	10,750,000
Unpaid Principal Balance	10,750,000	10,750,000
Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	10,750,000	10,750,000
Recorded Investment	10,750,000	10,750,000
Allowance Allocated	1,000,000	7,000,000
Average recorded investment in impaired loans	10,881,000	50,231,000
Investment income recognized	$ 7,117,000	$ 3,712,000