Subsequent Events - Mortgage Loans (Details) - Mortgage Loans $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2017 USD ($) loan property	Mar. 31, 2017 USD ($) loan property	Mar. 31, 2016 USD ($)
Mortgage Loan Receivables
Proceeds (including accrued interest) from payoff of mortgage loans | $		$ 10,796	$ 513
Number of Loans		7
ALF
Mortgage Loan Receivables
Number of Loans		1
Number of beds/units | property		70
Subsequent Event | ALF
Mortgage Loan Receivables
Proceeds (including accrued interest) from payoff of mortgage loans | $	$ 5,870
Number of Loans	2
Number of beds/units | property	70