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Commitments and Contingencies Narrative (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract] |  |  |
Partnership unfunded commitments |  |  | $ 4,238
Operating Lease, Impairment Loss |  | $ 175 |
Loss Contingency, Estimate of Possible Loss | $ 5,718 |  |
Gain Contingency, Unrecorded Amount | 10,161 |  |
Sublease Income | $ 149 |  |

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- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
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