Mortgage And Other Notes Receivable (Narrative) (Details) $ in Thousands	1 Months Ended		3 Months Ended			9 Months Ended
	Jan. 31, 2022 USD ($) bedOrUnitInTheProperty	Jun. 30, 2021 USD ($) property	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) property	Sep. 30, 2021 USD ($)	Sep. 30, 2022 property	Sep. 30, 2022 mortgage	Sep. 30, 2022 bedOrUnitInTheProperty	Sep. 30, 2022	Sep. 30, 2022 realEstateInvestment	Sep. 30, 2022 renewalOption	Sep. 30, 2022 loan	May 31, 2022 property	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			$ 207,169			$ 207,169										$ 299,952
Number of health care properties related to mortgage notes receivables								13	13
Credit loss reserve			(6,940)			(6,940)										$ (5,210)
Collections of mortgage and other notes receivable						117,973	$ 64,509
Interest income and other			4,891		$ 6,790	19,584	18,905
Loans and leases agreement						173,600
Amount funded on real estate investments			1,000			1,000
Increase rate in the amount of loss from a default											20.00%
Effective adjustment rate											44.00%
Life- Care Services - Sagewood
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collections of mortgage and other notes receivable				$ 111,300
Accrued interest and prepayment fee				$ 1,100
Interest income and other					$ 2,400	5,200	$ 8,100
Encore Senior Living
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			8,700			8,700
Loans and leases agreement	$ 28,500
Number of units acquired in a assisted living facility | bedOrUnitInTheProperty	108
Loan agreement term	4 years
Annual interest rate from master credit agreement	8.50%
Number of extensions | bedOrUnitInTheProperty	2
Note receivable renewal term	1 year
Montecito Medical Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			20,300			20,300
Loans and leases agreement						$ 50,000
Loan agreement term						5 years
Annual interest rate from master credit agreement											9.50%
Number of extensions | renewalOption													2
Note receivable renewal term						1 year
Amount funded on real estate investments			4,500			$ 4,500
Number of real estate investments | realEstateInvestment												2
Investment accrue interest rate											7.50%
Deferred interest rate to be paid upon certain future events											4.50%
Deferred interest											2.50%
Interest income and other			500			1,300
Payments for loans						300
Bickford Senior Living
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			46,422			46,422
Interest income and other			300			1,000
Loans and leases agreement						$ 4,000
Properties | property								36							3
Note receivable interest rate											7.00%
Mortgage loan amortization period						25 years
Bickford Note Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			13,800			$ 13,800
Contingent incentive payments			2,000			2,000
Senior Living Communities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			46,669			46,669
Number of extensions | property								2
Properties | property								10
Revolving amount line of credit			20,000			20,000
Revolving note receivable amount outstanding			(14,000)			$ (14,000)
Loans receivable facility bears interest rate						9.83%
Loans receivable maturity date						10 years
Loans receivable, U.S. Treasury rate											6.00%
Purchase option at a stated minimum price			38,300			$ 38,300
Secured By Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			130,600			130,600
Not Secured By Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage and other notes receivable, net			83,500			$ 83,500
Property Held by Fund | Montecito Medical Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of medical office buildings | property						9
Combined purchase price of medical office buildings						$ 86,700
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Bickford Senior Living
Accounts, Notes, Loans and Financing Receivable [Line Items]
Properties | property		6
Note receivable interest rate		10.00%
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Bickford Senior Living | Unlikely to be Collected Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in mortgage note receivable from sale of real estate		$ 13,000
Fully Funded | Bickford Senior Living
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases agreement						28,700
Number of construction loans | loan														2
Partially Funded | Bickford Senior Living
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases agreement						14,200
Number of construction loans | loan														1
After 2021 | Senior Living Communities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revolving amount line of credit			$ 15,000			15,000
July 2019 Transaction | Senior Living Communities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases agreement						$ 32,700
Number of units acquired in a assisted living facility | bedOrUnitInTheProperty										248
Loan agreement term						5 years
Annual interest rate from master credit agreement											7.25%