Real Estate (New Real Estate Investments) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) properties	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Payments to Acquire Real Estate | $	$ 131,758,000	$ 157,214,000	$ 359,257,000
Real Estate Investments During The Period | $	$ 155,644,000
Ensign Group [Member]
Number Of Real Estate Properties Acquired | properties	3
Real Estate Investments During The Period | $	$ 43,404,000
Bickford Senior Living [Member]
Number Of Real Estate Properties Acquired | properties	5
Comfort Care Senior Living [Member]
Number Of Real Estate Properties Acquired | properties	2
Real Estate Investments During The Period | $	$ 17,140,000
Real Estate Properties, Number Acquired | properties	2
Ignite Medical Resorts [Member]
Number Of Real Estate Properties Acquired | properties	1
Real Estate Investments During The Period | $	$ 25,350,000