Real Estate Real Estate (New Real Estate Investments) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) properties
Real Estate Investments During The Period | $	$ 129,661
The Lasalle Group [Member]
Real Estate Properties, Number Acquired | properties	5
Real Estate Investments During The Period | $	$ 61,865
Prestige Senior Living [Member]
Real Estate Properties, Number Acquired | properties	1
Real Estate Investments During The Period | $	$ 26,200
Ravn Senior Solutions [Member]
Real Estate Properties, Number Acquired | properties	2
Real Estate Investments During The Period | $	$ 16,100
Ensign Group [Member]
Real Estate Properties, Number Acquired | properties	1
Real Estate Investments During The Period | $	$ 15,096
Bickford Senior Living [Member]
Real Estate Properties, Number Acquired | properties	1