Loans Receivable (Details)	3 Months Ended				1 Months Ended				3 Months Ended								3 Months Ended		1 Months Ended				1 Months Ended
	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 Performing Loans USD ($)	Mar. 31, 2015 Workout Loans USD ($)	Nov. 30, 2014 NHP[Member] item property	Mar. 31, 2015 Real Estate Secured USD ($)	Dec. 31, 2014 Real Estate Secured USD ($)	Mar. 31, 2015 Real Estate Secured Performing Loans USD ($)	Mar. 31, 2015 Other Secured USD ($)	Dec. 31, 2014 Other Secured USD ($)	Mar. 31, 2015 Other Secured Performing Loans USD ($)	Mar. 31, 2015 Other Secured Workout Loans USD ($)	Mar. 31, 2015 Tandem Health Care Loan USD ($)	Jul. 31, 2012 Tandem Health Care Loan Maximum USD ($)	Jul. 31, 2012 Tandem Health Care Loan - First Tranche USD ($)	Jun. 30, 2013 Tandem Health Care Loan - Second Tranche USD ($)	Mar. 31, 2015 Delphis USD ($)	Dec. 31, 2014 Delphis USD ($)	Feb. 28, 2015 HC-One Facility USD ($)	Feb. 28, 2015 HC-One Facility GBP (£)	Nov. 30, 2014 HC-One Facility GBP (£)	Nov. 30, 2014 HC-One Facility USD ($)	Apr. 30, 2015 HC-One Facility Subsequent event GBP (£) property
Loans Receivable:
Mezzanine	$ 930,587,000	$ 799,064,000							$ 930,587,000	$ 799,064,000
Loan receivable, other	122,514,000	135,363,000				122,514,000	135,363,000							205,000,000	100,000,000	102,000,000					363,000,000	574,000,000
Unamortized discounts, fees and costs	(14,413,000)	(14,056,000)							(14,413,000)	(14,056,000)
Allowance for loan losses	(13,410,000)	(13,410,000)							(13,410,000)	(13,410,000)
Loans receivable, net	1,025,278,000	906,961,000	1,008,291,000	16,987,000		122,514,000	135,363,000	122,514,000	902,764,000	771,598,000	885,777,000	16,987,000
Remaining commitments to fund development projects									8,000,000
Percentage of Loan Portfolio	100.00%					12.00%			88.00%
Number of facilities					273																		36
Number of beds					12,500
Loan facility maximum																			795,000,000	502,000,000	395,000,000
Loan receivable term																					5 years
Proceeds from Lines of Credit																					355,000,000
Increase in loan facility																			164,000,000	108,000,000
Loan receivable subordinated to senior mortgage debt													435,000,000
Loan receivable, interest rate payable (as a percent)															12.00%	14.00%
Loans receivable, net reported amount																	17,000,000	17,000,000
Cash payments received from borrower																	500,000
Net repayments under bank line of credit	455,506,000
Amount of facility converted into sale/leaseback																							£ 174,000,000