Real Estate Real Estate (Schedule of Bickford Leases) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) properties
Number of Properties | properties	228
Bickford Senior Living [Member]
Number of Properties | properties	50
2019 Contractual Rent	$ 48,787
2019 Straight Line Rent	5,361
Total Revenues	$ 54,148
Bickford Senior Living [Member] | June 2023 [Member]
Number of Properties | properties	13
2019 Contractual Rent	$ 11,468
2019 Straight Line Rent	358
Total Revenues	$ 11,826
Bickford Senior Living [Member] | September 2027 [Member]
Number of Properties | properties	4
2019 Contractual Rent	$ 1,576
2019 Straight Line Rent	195
Total Revenues	$ 1,771
Bickford Senior Living [Member] | May 2031 [Member]
Number of Properties | properties	28
2019 Contractual Rent	$ 30,825
2019 Straight Line Rent	3,948
Total Revenues	$ 34,773
Bickford Senior Living [Member] | April 2033 [Member]
Number of Properties | properties	5
2019 Contractual Rent	$ 4,918
2019 Straight Line Rent	860
Total Revenues	$ 5,778