Other Borrowings and Subordinated Debt - Summary of Contractual Maturities and Scheduled Cash Flows of Federal Home Loan Bank Long Term Loan Advances (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Amount	$ 20,000	$ 20,000
Federal Home Loan Bank Advances Mid Term Repo Fixed Interest Rate At 0.91% [Member]
Debt Instrument [Line Items]
Amount	$ 5,000
Rate	0.91%
Due in	2023
Federal Home Loan Bank Advances Fixed Interest Rate At 0.97% [Member]
Debt Instrument [Line Items]
Amount	$ 5,000
Rate	0.97%
Due in	2024
Federal Home Loan Bank Advances Fixed Interest Rate At 1.10% [Member]
Debt Instrument [Line Items]
Amount	$ 5,000
Rate	1.10%
Due in	2025
Federal Home Loan Bank Advances Fixed Interest Rate At 1.01% [Member]
Debt Instrument [Line Items]
Amount	$ 3,000
Rate	1.01%
Due in	2025
Federal Home Loan Bank Advances Fixed Interest Rate At 1.02% [Member]
Debt Instrument [Line Items]
Amount	$ 2,000
Rate	1.02%
Due in	2025
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Amount	$ 20,000
Rate	1.00%

Federal home loan bank advances general debt obligations due year.

No definition available.

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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.

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- Definition

States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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-Publisher FASB
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-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

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- Definition

Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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