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Organization and Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Jan. 01, 2019
Accounting Policies [Line Items] |  |  |  |  |  |
Interest costs capitalized | $ 420 | $ 345 | $ 886 | $ 471 |  |
Mortgage loan |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Mortgage receivable | 2,653 |  | 2,653 |  |  |
Allowance for credit loss | 169 |  | $ 169 |  |  |
Collectability analysis, period used |  |  | 15 years |  |  |
Minimum |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Impact of COVID-19, requested rent deferral |  |  | 30 days |  |  |
Impact of COVID-19, requested rent deferral, period of payment |  |  | 3 months |  |  |
Initial lease term |  |  | 10 years |  |  |
Maximum |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Impact of COVID-19, requested rent deferral |  |  | 90 days |  |  |
Impact of COVID-19, requested rent deferral, period of payment |  |  | 18 months |  |  |
Initial lease term |  |  | 20 years |  |  |
Notes Payable to Banks |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Debt costs | 31,140 |  | $ 31,140 |  | $ 26,932 |
Debt costs accumulated amortization | $ 8,096 |  | $ 8,096 |  | $ 8,962 |
ASC 842 |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease – ROU assets |  |  |  |  |  | $ 7,735
Operating lease – lease liabilities |  |  |  |  |  | $ 10,155

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