Significant Accounting Policies Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 4,946		$ 0
Lessor, Operating Lease, Renewal Term	5 years
Bickford Senior Living [Member]
Variable Interest Entity [Line Items]
Lessor, Operating Lease, Term of Contract		12 years
Senior Living Communities [Member]
Variable Interest Entity [Line Items]
Lessor, Operating Lease, Term of Contract	15 years
Lessor, Operating Lease, Renewal Term	5 years
Straight-Line Rent Receivable [Member] | Bickford Senior Living [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	$ (63,304)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	75,738
Straight-Line Rent Receivable [Member] | Senior Living Communities [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	(82,691)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	83,410
Straight-Line Rent Receivable [Member] | Senior Living Management [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	(26,912)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	26,912
Notes Receivable [Member] | LCS Sagewood [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	(158,814)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	178,862
Notes Receivable [Member] | 41 Management [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	(13,328)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	33,572
Notes Receivable [Member] | Timber Ridge OpCo [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	(2,250)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	2,750
Notes Receivable [Member] | Watermark Retirement
Variable Interest Entity [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Carrying Amount	(4,145)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 9,145