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Organization and Summary of Significant Accounting Policies (Narrative) (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) Segment | Mar. 31, 2023 USD ($) | Apr. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |
Interest costs capitalized | $ 1,859,000 |  | $ 405,000 |  |  |
Revenue recognized on cash basis | 9,775,000 |  | 15,565,000 |  |  |
Revolving credit facility borrowing capacity | $ 983,800,000,000 |  |  | $ 1,200,000,000 |  |
Number of Operating Segments | Segment | 1 |  |  |  |  |
Classified as held for sale | $ 22,239,000 | [1] | 4,573,000 |  | $ 4,573,000 | [1]
Write-off of outstanding receivables and related accrued rent | 444,000 |  | $ 232,000 |  |  |
Escrow and other restricted accounts | $ 0 |  |  |  | 3,966,000 |
Land Improvements [Member] |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Property estimated useful life | 15 years |  |  |  |  |
Mortgage loan |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Mortgage receivable | $ 926,000 |  |  |  | 1,002,000 |
Allowance for credit loss | $ 19,000 |  |  |  | 64,000 |
Minimum | Building and Building Improvements [Member] |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Property estimated useful life | 20 years |  |  |  |  |
Maximum | Building and Building Improvements [Member] |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Property estimated useful life | 40 years |  |  |  |  |
Line of Credit |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Revolving credit facility borrowing capacity | $ 1,100,000,000 |  |  |  |  |
Loans Payable |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Debt costs | 42,595,000 |  |  |  |  |
Debt costs accumulated amortization | $ 15,071,000 |  |  |  | $ 14,343,000 |
[1] |
(2) | As of March 31, 2024, five Properties were classified as held for sale. The property classified as held for sale as of December 31, 2023 was sold during the quarter ended March 31, 2024.

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