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Derivatives - Additional Information (Detail) - Interest Rate Swap [Member] - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Collateral Pledged [Member]
Derivatives Fair Value [Line Items]
Cash and securities at fair value pledged for collateral	$ 0	$ 0
Cash and Cash Equivalents [Member]
Derivatives Fair Value [Line Items]
Cash and securities at fair value pledged for collateral	$ 0	$ 0

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- Definition

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

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481961/940-320-45-2

+ Details

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Balance Type:	debit
Period Type:	instant

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- Details

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X

- Details

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Namespace Prefix:
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X

- Details

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