Organization and Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) Tenant	Mar. 31, 2022	Sep. 30, 2021 USD ($) Tenant	Sep. 30, 2022 USD ($) Tenant	Sep. 30, 2021 USD ($) Tenant	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Accounting Policies [Line Items]
Interest costs capitalized	$ 273,000		$ 87,000	$ 547,000	$ 215,000
Total Properties	5.20%		5.60%	5.20%	5.60%
Total gross leasable area	6.80%		7.40%	6.80%	7.40%
Percentage of tenants for which revenue recognized on cash basis | Tenant	8		11	8	11
Lessor Lease, Rent Deferral Lease Amendments Due To Covid-19, Deferred Rent Originally Due Current Fiscal Year							$ 4,758,000			$ 52,019,000
Lessor Lease, Rent Deferral Lease Amendments Due To Covid-19, Deferred Rent Repaid				$ 11,561,000			31,776,000
Revenue recognized on cash basis	$ 15,346,000		$ 13,630,000	46,631,000	$ 37,999,000
Revolving credit facility borrowing capacity	1,052,500,000,000			1,052,500,000,000				$ 1,100,000,000,000	$ 900,000,000
Real estate held for sale	4,181,000			4,181,000			5,557,000
Debt costs	$ 10,144,000			$ 10,144,000
Rent repaid						$ 2,965,000
Number of tenants | Tenant	3			3
Mortgage loan
Accounting Policies [Line Items]
Mortgage receivable	$ 1,633,000,000			$ 1,633,000,000			2,023,000,000
Allowance for credit loss			$ 104,000		$ 104,000		129,000,000
Collectability analysis, period used		15 years
Minimum
Accounting Policies [Line Items]
Initial lease term				10 years
Maximum
Accounting Policies [Line Items]
Initial lease term				20 years
Line of Credit
Accounting Policies [Line Items]
Revolving credit facility borrowing capacity	1,100,000,000			$ 1,100,000,000
Loans Payable
Accounting Policies [Line Items]
Debt costs							38,145,000
Debt costs accumulated amortization	$ 11,075,000			$ 11,075,000			$ 9,262,000