Concentration of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets. | Concentration of credit risk | HCR ManorCare, Inc.
Concentration of credit risk
Percentage of total	94.00%	97.00%
Assets. | Pennsylvania
Concentration of credit risk
Percentage of total	20.00%	21.00%
Assets. | Illinois
Concentration of credit risk
Percentage of total	12.00%	13.00%
Assets. | Ohio
Concentration of credit risk
Percentage of total	13.00%	13.00%
Assets. | Michigan
Concentration of credit risk
Percentage of total	10.00%	9.00%
Assets. | Florida
Concentration of credit risk
Percentage of total	11.00%	11.00%
Revenue | Concentration of credit risk | HCR ManorCare, Inc.
Concentration of credit risk
Percentage of total	94.00%	95.00%	95.00%
Revenue | Pennsylvania
Concentration of credit risk
Percentage of total	24.00%	22.00%	21.00%
Revenue | Illinois
Concentration of credit risk
Percentage of total	10.00%	11.00%	13.00%
Revenue | Ohio
Concentration of credit risk
Percentage of total	7.00%	10.00%	12.00%
Revenue | Michigan
Concentration of credit risk
Percentage of total	10.00%	9.00%	9.00%
Revenue | Florida
Concentration of credit risk
Percentage of total	10.00%	10.00%	10.00%