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Fair Value Option - Additional Information (Detail) $ in Thousands	Mar. 31, 2024 USD ($) Loans	Dec. 31, 2023 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of financial instruments more than one day past due	$ 1,313	$ 1,345
Corporate Loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of financial instruments more than one day past due	$ 1,313	1,345
Corporate Loans | Not In Non Accrual Status
Fair Value, Option, Quantitative Disclosures [Line Items]
Number of loans for which fair value option was elected past due | Loans	2
Loans and Receivables
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of financial instruments more than one day past due	$ 0	0
Fair value of financial instruments with non-accrual status	$ 0	$ 0

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-30

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-31

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-32

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