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Summary of Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 item | Mar. 31, 2023 USD ($) item $ / shares | Jun. 30, 2023 USD ($) item | Mar. 31, 2023 USD ($) item | Jan. 01, 2023 USD ($) | Dec. 31, 2022 USD ($)
Stock-based compensation |  |  |  |  |  |
Aggregate grant date fair value of awards granted during period |  | $ 25,000 |  |  |  |
Per share grant date fair value of awards granted during period | $ / shares |  | $ 28.89 |  |  |  |
Award vesting period |  | 4 years |  |  |  |
Income taxes |  |  |  |  |  |
Number of Taxable REIT Subsidiaries | item |  |  | 2 |  |  |
Current income tax expense |  |  | $ 400 |  |  |
Deferred income tax expense |  |  | 100 |  |  |
Franchise and other state and local income taxes |  |  | $ 50 |  |  |
Loan receivable |  |  |  |  |  |
Financing Receivable, Practical Expedient, Accrued Interest Exclusion |  |  | true |  |  |
Allowance for credit losses |  |  |  |  |  |
Amount of allowance for credit losses on ground lease receivables |  |  | $ 281 |  |  |
Deferred expenses and other assets, net |  |  |  |  |  |
Loan receivable |  |  |  |  |  |
Accrued interest on loans receivable |  |  | $ 26 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 |  |  |  |  |  |
Allowance for credit losses |  |  |  |  |  |
Amount of allowance for credit losses on net investment in sales-type leases |  |  |  |  | $ 400 | $ 400
Amount of allowance for credit losses on ground lease receivables |  |  |  |  | $ 200 | $ 200
Star Holdings |  |  |  |  |  |
Loan receivable |  |  |  |  |  |
Term on loan | 4 years |  |  |  |  |
Star Holdings | Affiliated entity |  |  |  |  |  |
Loan receivable |  |  |  |  |  |
Term on loan | 4 years |  |  |  |  |
Management fees |  |  |  |  |  |
Annual management fee - Year 1 |  |  |  | $ 25,000 |  |
Annual management fee - Year 2 |  |  |  | 15,000 |  |
Annual management fee - Year 3 |  |  |  | 10,000 |  |
Annual management fee - Year 4 |  |  |  | $ 5,000 |  |
Annual management fee percent of gross book value, year five and thereafter |  |  |  | 2.00% |  |
iStar Merger |  |  |  |  |  |
Equity investments |  |  |  |  |  |
Number of equity investments acquired | item | 2 | 2 |  | 2 |  |

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