Significant Accounting Policies Significant Accounting Policies (Schedule of Variable Interest Entities) (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Straight-Line Rent Receivable [Member] | Bickford Senior Living [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	$ 60,133
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	69,665
Straight-Line Rent Receivable [Member] | Senior Living Communities [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	83,814
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	94,059
Straight-Line Rent Receivable [Member] | Senior Living Management [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	26,796
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	26,796
Notes Receivable [Member] | LCS Timber Ridge [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	59,156
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	59,808
Notes Receivable [Member] | Evolve Senior Living [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	9,943
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	9,943
Notes Receivable [Member] | LCS Sagewood [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	107,890
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	178,498
Notes Receivable [Member] | 41 Management [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	3,223
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 10,800