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Related Party Transactions and Investments in Non-Consolidated Entities - Sponsored REIT Loans outstanding (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) item | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Oct. 29, 2021 USD ($) | Oct. 28, 2021 USD ($)
Sponsored REITs |  |  |  |  |
Maximum amount of loan | $ 24,000,000 |  |  |  |
Amount Drawn | 24,000,000 |  |  | $ 24,000,000 | $ 21,000,000
Interest income and fees from the Sponsored REIT Loans |  |  | $ 1,500,000 |  |
Related party mortgage loan receivable | $ 24,000,000 |  |  | 24,000,000 | $ 21,000,000
Number of additional commitments to lend | item | 0 |  |  |  |
Sponsored REITs |  |  |  |  |
Sponsored REITs |  |  |  |  |
Interest income and fees from the Sponsored REIT Loans | $ 1,800,000 | $ 1,600,000 |  |  |
FSP Monument Circle LLC |  |  |  |  |
Sponsored REITs |  |  |  |  |
Additional loan amount |  |  |  | $ 3,000,000.0 |
Mortgage loan | FSP Monument Circle LLC |  |  |  |  |
Sponsored REITs |  |  |  |  |
Maximum amount of loan | 24,000,000 |  |  |  |
Amount Drawn | $ 24,000,000 |  |  |  |
Interest rate (as a percent) | 7.51% |  |  |  |
Origination fee | $ 164,000 |  |  |  |
Exit fee | 38,000 |  |  |  |
Related party mortgage loan receivable | $ 24,000,000 |  |  |  |

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- Definition Reflects the additional amount of loan due from related parties at the balance sheet date. + References No definition available. + Details
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- Definition Reflects the maximum amount of loan due from related parties at the balance sheet date. + References No definition available. + Details
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- Definition Represents the exit fee to be paid by the borrowed when repayment is made. + References No definition available. + Details
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- Definition Interest and fee income related to commercial loans including industrial and agricultural, real estate (commercial and residential, construction and development), trade financing, and lease financing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(e)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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