Significant Accounting Policies (Schedule of Variable Interest Entities) (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Straight-Line Rent Receivable [Member] | Bickford Senior Living [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	$ 57,024
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	60,120
Straight-Line Rent Receivable [Member] | Senior Living Communities [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	92,155
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	96,454
Straight-Line Rent Receivable [Member] | Senior Living Management [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	26,940
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	26,940
Notes Receivable [Member] | Evolve Senior Living [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	9,953
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	9,953
Notes Receivable [Member] | LCS Sagewood [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	133,307
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	178,614
Notes Receivable [Member] | 41 Management [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	12,133
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	15,313
Notes Receivable [Member] | Timber Ridge OpCo
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	434
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 5,434