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Fair Value Measurements and Disclosure - Summary of Financial Assets Measured at Fair Value on NonRecurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	$ 1,470,144	$ 1,347,137
Fair Value, Nonrecurring [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	4,485	30
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	4,485	30
Impaired Loans [Member] | Fair Value, Nonrecurring [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure		30
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure		$ 30
Collateral dependent loan [Member] | Fair Value, Nonrecurring [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	4,485
Collateral dependent loan [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0
Collateral dependent loan [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0
Collateral dependent loan [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	$ 4,485

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- Definition

Fair value assets measured on nonrecurring basis line item.

+ References

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Publisher FASB
-URI https://asc.fasb.org//310-10/tableOfContent

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