Real Estate Real Estate (Schedule of Bickford Leases) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($) properties
Number of Properties | properties	222
Bickford Senior Living [Member]
Number of Properties | properties	51
2019 Contractual Rent	$ 39,707
2019 Straight Line Rent	3,778
Total Revenues	$ 43,485
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 2024 [Member]
Number of Properties | properties	10
2019 Contractual Rent	$ 9,542
2019 Straight Line Rent	670
Total Revenues	$ 10,212
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	19
2019 Contractual Rent	$ 12,203
2019 Straight Line Rent	1,695
Total Revenues	$ 13,898
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