Commitments, Contingencies and Uncertainties (Schedule of Loan Commitments) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	$ 274,700,000
Loans and Leases Receivable, Net Amount	(299,952,000)	$ (292,427,000)
Notes Receivable Funding Commitment	75,279,000
LCS Sagewood [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Net Amount	(180,000,000)
Bickford Senior Living [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Net Amount	(40,599,000)
Senior Living Communities [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Net Amount	(42,266,000)
Montecito Medical Real Estate
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	50,000,000
Loans and Leases Receivable, Net Amount	(12,300,000)
Note A [Member] | LCS Sagewood [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	118,800,000
Loans and Leases Receivable, Net Amount	(110,794,000)
Notes Receivable Funding Commitment	8,006,000
Note A [Member] | Senior Living Communities [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	12,000,000
Note B [Member] | Senior Living Communities [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	2,000,000
Development Commitment [Member] | Bickford Senior Living [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	42,900,000
Loans and Leases Receivable, Net Amount	(36,655,000)
Notes Receivable Funding Commitment	6,245,000
Development Commitment [Member] | 41 Management Sussex
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	22,200,000
Loans and Leases Receivable, Net Amount	(17,708,000)
Notes Receivable Funding Commitment	4,492,000
Revolving Credit Facility [Member] | Senior Living Communities [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	20,000,000
Loans and Leases Receivable, Net Amount	(9,566,000)
Notes Receivable Funding Commitment	10,434,000
Working Capital [Member] | 41 Management [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	10,800,000
Loans and Leases Receivable, Net Amount	(9,071,000)
Notes Receivable Funding Commitment	1,729,000
Working Capital [Member] | Timber Ridge OpCo [Member]
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	5,000,000
Loans and Leases Receivable, Net Amount	0
Notes Receivable Funding Commitment	5,000,000
Working Capital [Member] | Watermark Retirement
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	5,000,000
Loans and Leases Receivable, Net Amount	(3,307,000)
Notes Receivable Funding Commitment	1,693,000
Working Capital [Member] | Montecito Medical Real Estate
Net Investment Income [Line Items]
Loans and Leases Receivable, Commitments, Fixed Rates	50,000,000
Loans and Leases Receivable, Net Amount	(12,320,000)
Notes Receivable Funding Commitment	37,680,000
Notes Receivable, Amount Funded
Net Investment Income [Line Items]
Loans and Leases Receivable, Net Amount	$ (199,421,000)