Commitments And Contingencies (Schedule of Rent Concessions) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Lease Payment Deferral [Member]
Operating Lease, Lease Income		$ 24,855
Lease Payment Deferral [Member] | Lease Payment Deferral 2020
Operating Lease, Lease Income		4,982
Lease Payment Deferral [Member] | Rent Deferred Second Quarter of 2021
Operating Lease, Lease Income	$ 5,775
Lease Payment Deferral [Member] | Rent Deferred Six Months of 2021
Operating Lease, Lease Income		19,873
Lease Payment Deferral [Member] | Collection of Rent Deferred
Operating Lease, Lease Income	44	44
Lease Payment Deferral [Member] | Bickford Senior Living [Member]
Operating Lease, Lease Income		17,500
Lease Payment Deferral [Member] | Bickford Senior Living [Member] | Lease Payment Deferral 2020
Operating Lease, Lease Income		3,750
Lease Payment Deferral [Member] | Bickford Senior Living [Member] | Rent Deferred Six Months of 2021
Operating Lease, Lease Income		13,750
Lease Payment Deferral [Member] | Bickford Senior Living [Member] | Rent Deferred Third Quarter of 2021
Operating Lease, Lease Income	3,500
Lease Payment Deferral [Member] | Bickford Senior Living [Member] | Rent Deferred Nine Months of 2021
Operating Lease, Lease Income		13,750
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member]
Operating Lease, Lease Income		1,800
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member] | Rent Deferred Six Months of 2021
Operating Lease, Lease Income		1,800
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member] | Rent Deferred Third Quarter of 2021
Operating Lease, Lease Income	600
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member] | Rent Deferred Nine Months of 2021
Operating Lease, Lease Income		1,800
Lease Payment Deferral [Member] | Other Than Bickford and Holiday
Operating Lease, Lease Income		5,555
Lease Payment Deferral [Member] | Other Than Bickford and Holiday | Lease Payment Deferral 2020
Operating Lease, Lease Income		1,232
Lease Payment Deferral [Member] | Other Than Bickford and Holiday | Rent Deferred Six Months of 2021
Operating Lease, Lease Income		4,323
Lease Payment Deferral [Member] | Other Than Bickford and Holiday | Rent Deferred Third Quarter of 2021
Operating Lease, Lease Income	1,675
Lease Payment Deferral [Member] | Other Than Bickford and Holiday | Rent Deferred Nine Months of 2021
Operating Lease, Lease Income		4,323
Lease Payment Deferral [Member] | Other Than Bickford and Holiday | Collection of Rent Deferred
Operating Lease, Lease Income	$ 44	44
Lease Abatement [Member]
Operating Lease, Lease Income		2,150
Lease Abatement [Member] | Lease Abatement for 2020
Operating Lease, Lease Income		2,150
Lease Abatement [Member] | Bickford Senior Living [Member]
Operating Lease, Lease Income		2,100
Lease Abatement [Member] | Bickford Senior Living [Member] | Lease Abatement for 2020
Operating Lease, Lease Income		2,100
Lease Abatement [Member] | Other Than Bickford and Holiday
Operating Lease, Lease Income		50
Lease Abatement [Member] | Other Than Bickford and Holiday | Lease Abatement for 2020
Operating Lease, Lease Income		$ 50