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Allowance for Loan Losses - Performing and Nonperforming Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Performing	$ 371,882	$ 382,911
Total	371,882	382,911
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing	344,563	354,987
Total	344,563	354,987
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing	15,994	15,948
Total	15,994	15,948
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing	11,325	11,976
Total	$ 11,325	$ 11,976

X

- Definition

Performing and nonperforming loans.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Financing arrangement that represents a contractual right to receive money either on demand or on fixed or determinable dates that are current in regards to payments.

+ References

No definition available.

+ Details

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X

- 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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- Details

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X

- Details

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Balance Type:
Period Type:

X

- Details

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