Loans Receivable (Details)							1 Months Ended													1 Months Ended	12 Months Ended			1 Months Ended		0 Months Ended				3 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Brookdale Senior Living USD ($)	Aug. 29, 2014 RIDEA JV Brookdale Senior Living USD ($)	Dec. 31, 2014 Performing Loans USD ($)	Dec. 31, 2014 Workout Loans USD ($)	Nov. 30, 2014 NHP[Member] item property	Dec. 31, 2014 Real Estate Secured USD ($)	Dec. 31, 2013 Real Estate Secured USD ($)	Dec. 31, 2014 Real Estate Secured Performing Loans USD ($)	Dec. 31, 2014 Other Secured USD ($)	Dec. 31, 2013 Other Secured USD ($)	Dec. 31, 2014 Other Secured Performing Loans USD ($)	Dec. 31, 2014 Other Secured Workout Loans USD ($)	Dec. 31, 2014 Tandem Health Care Loan USD ($)	Jul. 31, 2012 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, 2012 Delphis USD ($)	Dec. 31, 2014 Delphis USD ($) item	Dec. 31, 2013 Delphis USD ($)	Dec. 31, 2012 Delphis USD ($)	Nov. 30, 2014 U.K. loan facility commitment USD ($)	Nov. 30, 2014 U.K. loan facility commitment GBP (£)	Sep. 06, 2013 Barchester Loan USD ($)	Sep. 06, 2013 Barchester Loan GBP (£)	May 02, 2013 Barchester Loan USD ($)	May 02, 2013 Barchester Loan GBP (£)	Sep. 30, 2013 Barchester Loan USD ($)	Sep. 30, 2013 Barchester Loan GBP (£)
Loans Receivable:
Mezzanine	$ 799,064,000	$ 234,455,000									$ 799,064,000	$ 234,455,000
Loan receivable, other	135,363,000	147,669,000						135,363,000	147,669,000								205,000,000	100,000,000	102,000,000						363,000,000
Unamortized discounts, fees and costs	(14,056,000)	(2,713,000)									(14,056,000)	(2,713,000)
Allowance for loan losses	(13,410,000)	(13,410,000)									(13,410,000)	(13,410,000)									(13,000,000)
Loans receivable, net	906,961,000	366,001,000	26,000,000		889,491,000	17,470,000		135,363,000	147,669,000	135,363,000	771,598,000	218,332,000	754,128,000	17,470,000
Percentage of Loan Portfolio	100.00%							15.00%			85.00%
Consideration received - Note receivable				68,000,000
Loans receivable purchased, face or par value																													121,000,000
Loans receivable purchased, discount																												170,000,000	109,000,000
Number of facilities							273
Number of beds							12,500
Loan facility maximum																									395,000,000
Amount drawn at closing																								574,000,000
Proceeds from Lines of Credit																									355,000,000
Loan receivable subordinated to senior mortgage debt															437,000,000	400,000,000
Loan receivable subordinated to other senior mezzanine debt																137,000,000
Loan receivable, interest rate payable (as a percent)																		12.00%	14.00%
Loan receivable term																								5 years	5 years
Number of partnerships that lease a property owned by the Company																					1
Distribution of fund to guarantor																				1,500,000
Cash payments received from borrower																					1,000,000	13,000,000	43,000,000			202,000,000	129,000,000			202,000,000	129,000,000
Interest income related to loans																										24,000,000
Loans receivable, net reported amount																					$ 17,000,000	$ 18,000,000