Real Estate Real Estate (Schedule of Bickford Leases) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) properties
Number of Properties | properties	220
Bickford Senior Living [Member]
Number of Properties | properties	50
2017 Contractual Rent	$ 48,635
Straight Line Rent Adjustment	5,333
Total Revenues	$ 53,968
Bickford Senior Living [Member] | June 2023 [Member]
Number of Properties | properties	13
2017 Contractual Rent	$ 11,468
Straight Line Rent Adjustment	358
Total Revenues	$ 11,826
Bickford Senior Living [Member] | September 2027 [Member]
Number of Properties | properties	4
2017 Contractual Rent	$ 1,576
Straight Line Rent Adjustment	195
Total Revenues	$ 1,771
Bickford Senior Living [Member] | May 2031 [Member]
Number of Properties | properties	28
2017 Contractual Rent	$ 30,765
Straight Line Rent Adjustment	3,937
Total Revenues	$ 34,702
Bickford Senior Living [Member] | April 2033 [Member]
Number of Properties | properties	5
2017 Contractual Rent	$ 4,826
Straight Line Rent Adjustment	843
Total Revenues	$ 5,669