Commitments And Contingencies (Schedule of Rent Concessions) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Lease Payment Deferral [Member]
Operating Lease, Lease Income	$ 19,080
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	9,901
Lease Payment Deferral [Member] | Rent Deferred Six Months of 2021
Operating Lease, Lease Income	14,098
Lease Payment Deferral [Member] | Bickford Senior Living [Member]
Operating Lease, Lease Income	14,000
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 Second Quarter of 2021
Operating Lease, Lease Income	6,500
Lease Payment Deferral [Member] | Bickford Senior Living [Member] | Rent Deferred Six Months of 2021
Operating Lease, Lease Income	10,250
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member]
Operating Lease, Lease Income	1,200
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member] | Rent Deferred Second Quarter of 2021
Operating Lease, Lease Income	1,200
Lease Payment Deferral [Member] | Holiday Acquisition Holdings [Member] | Rent Deferred Six Months of 2021
Operating Lease, Lease Income	1,200
Lease Payment Deferral [Member] | Other Than Bickford and Holiday
Operating Lease, Lease Income	3,880
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 Second Quarter of 2021
Operating Lease, Lease Income	2,201
Lease Payment Deferral [Member] | Other Than Bickford and Holiday | Rent Deferred Six Months of 2021
Operating Lease, Lease Income	2,648
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