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Summary of Significant Accounting Policies (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) segment | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of operating segments | segment | 1 |  |
Fees paid to unaffiliated advisers | $ | $ 54.7 | $ 77.0 | $ 115.5
Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Weighted average of useful life | 4 years |  |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Weighted average of useful life | 16 years |  |
Furniture and Office Equipment | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of furniture and equipment | 3 years |  |
Furniture and Office Equipment | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of furniture and equipment | 7 years |  |
Computer Equipment and Software |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of furniture and equipment | 3 years |  |

X
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
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