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Related Party Transactions and Investments in Non-Consolidated Entities (Tables) | 12 Months Ended
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Dec. 31, 2022
Related Party Transactions and Investments in Non-Consolidated Entities |
Schedule of equity in losses of investments in non-consolidated REITs | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended | ​
​ | ​ | ​ | December 31, | ​
(in thousands) |  | 2021 |
​ | ​ | ​ | ​ |
Equity in income of East Wacker | ​ | $ | 421 | ​
Total | ​ | $ | 421 | ​
​
Schedule of distributions received from non-consolidated REITs | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year Ended | ​
​ | ​ | ​ | December 31, | ​
(in thousands) |  | 2021 |
​ | ​ | ​ | ​ | ​
Distributions from East Wacker | ​ | $ | 421 | ​
​ | ​ | $ | 421 | ​
​
Summary of the Sponsored REIT Loans outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  |  |  | Maximum |  | Amount | Interest |
(dollars in thousands, except footnotes) |  | ​ | ​ | Maturity | ​ | Amount | ​ | Outstanding | Rate at |
Sponsored REIT |  | Location | ​ | Date | ​ | of Loan | ​ | 31-Dec-22 | 31-Dec-22 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
Mortgage loan secured by property | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
FSP Monument Circle LLC (1) | ​ | Indianapolis, IN | ​ | 30-Jun-23 | ​ | $ | 24,000 | ​ | $ | 24,000 | 7.51 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | $ | 24,000 | ​ | $ | 24,000 | ​ | ​
(1)This mortgage loan includes an origination fee of $164,000 and an exit fee of $38,000 when repaid by the borrower.
Allowance for credit losses rollforward | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31,
(Dollars in thousands) |  | ​ | 2022 |  | ​ | 2021 |  | ​ | 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning allowance for credit losses | ​ | $ | — | ​ | $ | — | ​ | $ | —
Additional increases to the allowance for credit losses | ​ | ​ | 4,237 | ​ | ​ | — | ​ | ​ | —
Ending allowance for credit losses | ​ | $ | 4,237 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
Quantitative information about significant unobservable inputs of Level 3 measurement | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Fair Value (1) at |  | ​ |  | Significant |  | Range | ​ | Weighted
Description | ​ | December 31, 2022 | ​ | Valuation Technique | ​ | Unobservable Input | ​ | Min | ​ | Max |  | Average (2)
​ | ​ | ​ | (in thousands) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Sponsored REIT Loan | ​ | $ | 19,763 |  | Discounted Cash Flows | ​ | Exit Cap Rate |  | 7.50 | % | ​ | 7.50 | % | ​ | 7.50 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Discount Rate | ​ | 9.50 | % | ​ | 9.50 | % | ​ | 9.50 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) Classified within Level 3 of the fair value hierarchy. | ​
(2) Unobservable inputs were weighted based on the fair value of the related instrument. | ​

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