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v3.24.0.1

Borrowings - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Oct. 31, 2019 | May 31, 2015
Debt Instrument [Line Items] |  |  |  |  |
Federal home loan bank advance | $ 210,000,000 | $ 311,700,000 |  |  |
Federal home loan bank stock | 12,300,000 | 14,700,000 |  |  |
Subordinated notes, net | 39,855,000 | 39,920,000 |  |  |
Subordinated debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Subordinated notes, net | $ 39,900,000 | $ 39,900,000 |  |  |
Subordinated debt [Member] | 2030 Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Subordinated debt instrument maturity date | Jun. 01, 2030 |  |  |  |
Subordinated notes, net |  |  |  |  | $ 15,000,000
Stated Interest Rate | 6.00% |  |  |  |
Debt instrument, frequency of periodic payment | semi-annually |  |  |  |
Effective interest rate | 6.09% | 6.11% | 6.12% |  |
Unamortized debt issuance cost | $ 14,800,000 | $ 14,700,000 |  |  |
Subordinated debt [Member] | 2030 Notes [Member] | SOFR [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Subordinated debt instrument variable interest rate spread | 5.87% |  |  |  |
Subordinated debt [Member] | 2029 Bay Banks Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated Interest Rate | 5.625% |  |  |  |
Debt instrument, frequency of periodic payment | semi-annually |  |  |  |
Subordinated debt [Member] | 2029 Bay Banks Notes [Member] | SOFR [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Subordinated debt instrument variable interest rate spread | 4.335% |  |  |  |
Subordinated debt [Member] | 2029 Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Subordinated debt instrument maturity date | Oct. 15, 2029 |  |  |  |
Subordinated notes, net |  |  |  | $ 25,000,000 |
Debt instrument carrying amount | $ 25,100,000 |  |  |  |
Debt Instrument, Unamortized Premium | $ 578,000 |  |  |  |
Effective interest rate | 5.08% | 5.08% | 4.73% |  |
Federal Reserve Board Bank Term Funding Program [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowings avalible through BTFP | $ 260,900,000 |  |  |  |
FRB Borrowings one advance | $ 65,000,000 |  |  |  |
Maturity date of FRB borrowings | May 10, 2024 |  |  |  |
Stated Interest Rate | 4.74% |  |  |  |
Borrowings available through discount window | $ 161,000,000 |  |  |  |
Advance from federal reserve bank | 0 |  |  |  |
Unsecured Lines of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum overnight line of credit facilities available | 10,000,000 | $ 28,000,000 |  |  |
Overnight line of credit facilities outstanding | $ 0 | 0 |  |  |
FHLB [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Federal home loan bank advances, maximum borrowing capacity percentage on assets | 30.00% |  |  |  |
Line of creidt | $ 455,600,000 | 525,100,000 |  |  |
Federal home loan bank advance | 210,000,000 | 311,700,000 |  |  |
FHLB [Member] | Restricted Equity Investments [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Federal home loan bank stock | 12,300,000 | 14,700,000 |  |  |
FHLB [Member] | Line of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Federal home loan bank advance | 135,500,000 | 128,300,000 |  |  |
FHLB [Member] | Line of Credit [Member] | 1-4 Family Residential Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets pledged with federal home loan bank against credit facilities | 237,500,000 |  |  |  |
FHLB [Member] | Line of Credit [Member] | Multi-Family Residential Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets pledged with federal home loan bank against credit facilities | 36,600,000 |  |  |  |
FHLB [Member] | Line of Credit [Member] | Commercial Real Estate Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets pledged with federal home loan bank against credit facilities | 151,600,000 |  |  |  |
FHLB [Member] | Line of Credit [Member] | Securities [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets pledged with federal home loan bank against credit facilities | 29,700,000 |  |  |  |
FHLB [Member] | Line of Credit [Member] | Public Deposits with Treasury Board of Virginia [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets pledged with federal home loan bank against credit facilities | $ 110,100,000 | $ 85,100,000 |  |  |

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480876/942-470-45-1 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-4 + Details
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- Definition Amount, after accumulated amortization, of debt premium. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
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- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Principal amount outstanding of advances made and reported by Federal Home Loan Bank (FHLBank) relating to the Affordable Housing Program (AHP). + References No definition available. + Details
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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 325 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481026/942-325-45-1 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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- Definition Date the credit facility terminates, in YYYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Date the payments are due on subordinated debt, in YYYY-MM-DD format. + References No definition available. + Details
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