Real Estate Real Estate (Schedule of Bickford Leases) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) properties
Number of Properties | properties	219
Bickford Senior Living [Member]
Number of Properties | properties	52
2017 Contractual Rent	$ 44,889
Straight Line Rent Adjustment	4,612
Total Revenues	$ 49,501
Bickford Senior Living [Member] | Sept / Oct 2019 [Member]
Number of Properties | properties	10
2017 Contractual Rent	$ 9,264
Straight Line Rent Adjustment	(617)
Total Revenues	$ 8,647
Bickford Senior Living [Member] | June 2023 [Member]
Number of Properties | properties	13
2017 Contractual Rent	$ 11,133
Straight Line Rent Adjustment	588
Total Revenues	$ 11,721
Bickford Senior Living [Member] | September 2027 [Member]
Number of Properties | properties	4
2017 Contractual Rent	$ 1,515
Straight Line Rent Adjustment	221
Total Revenues	$ 1,736
Bickford Senior Living [Member] | May 2031 [Member]
Number of Properties | properties	20
2017 Contractual Rent	$ 19,872
Straight Line Rent Adjustment	3,813
Total Revenues	$ 23,685
Bickford Senior Living [Member] | April 2023 [Member]
Number of Properties | properties	5
2017 Contractual Rent	$ 3,105
Straight Line Rent Adjustment	607
Total Revenues	$ 3,712