Loans Receivable (Details) (USD $)	3 Months Ended								3 Months Ended							0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Performing Loans	Mar. 31, 2014 Workout Loans	Mar. 31, 2014 Real Estate Secured	Dec. 31, 2013 Real Estate Secured	Mar. 31, 2014 Real Estate Secured Performing Loans	Mar. 31, 2014 Other Secured	Dec. 31, 2013 Other Secured	Mar. 31, 2014 Other Secured Performing Loans	Mar. 31, 2014 Other Secured Workout Loans	Mar. 31, 2014 Tandem Health Care Loan	Jul. 31, 2012 Tandem Health Care Loan Maximum	Jul. 31, 2012 Tandem Health Care Loan - First Tranche	Jul. 31, 2012 Tandem Health Care Loan - First Tranche Maximum	Jun. 30, 2013 Tandem Health Care Loan - Second Tranche	Mar. 31, 2014 Delphis	Dec. 31, 2013 Delphis
Loans receivable:
Mezzanine	$ 234,455,000		$ 234,455,000						$ 234,455,000	$ 234,455,000
Loan receivable, other	152,759,000		147,669,000			152,759,000	147,669,000							205,000,000	100,000,000		102,000,000
Unamortized discounts, fees and costs	(2,632,000)		(2,713,000)						(2,632,000)	(2,713,000)
Allowance for loan losses	(13,410,000)								(13,410,000)									(13,410,000)	(13,410,000)
Loans receivable, net	371,172,000		366,001,000	353,101,000	18,071,000	152,759,000	147,669,000	152,759,000	218,413,000	218,332,000	200,342,000	18,071,000
Construction loans outstanding related to senior housing development projects									123,000,000	117,000,000
Remaining commitments to fund development projects									25,000,000
Percentage of Loan Portfolio	100.00%					41.00%			59.00%
Loan receivable subordinated to senior mortgage debt													442,000,000
Loan receivable, interest rate payable (as a percent)															12.00%		14.00%
Loan receivable term																63 months
Loans receivable, net reported amount																		18,100,000	18,100,000
Additional interest income as a result of extinguishment of loans	16,696,000	12,386,000
Reconciliation of beginning and ending allowance
Balance at the beginning	13,410,000								13,410,000									13,410,000	13,410,000
Balance at the end	$ 13,410,000								$ 13,410,000									$ 13,410,000	$ 13,410,000