Fair Value Disclosure (Detail) - USD ($)	3 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Collateral dependent loans balance minimum threshold for individual assessment	$ 100,000
Fair value of notional amount	$ 32,000,000	$ 21,800,000
Projected pull-through rate	84.20%	82.70%

This element represents the net excess or deficiency of the fair value of an investment (security, contract) over or under its cost (face amount, notional amount), respectively, which excess value or deficiency has not been recognized in earnings of the entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-22

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant