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Borrowings - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 29, 2018 USD ($) investor | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2009 quarter | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2003 USD ($) | Jul. 31, 2023 USD ($) | Dec. 21, 2022 USD ($) | Jun. 22, 2022 | Dec. 22, 2016 USD ($) | Dec. 31, 2004
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | $ 201,105,000 | $ 115,200,000 |  |  |  |  |  |  |
Advances from federal home loan banks, total |  |  |  |  |  | 101,000,000 | 85,000,000 |  |  |  |  |  |  |
Federal home loan bank, advances, maturities summary, fixed rate, total |  |  |  |  |  | $ 101,000,000 |  |  |  |  |  |  |  |
Federal home loan bank, advances, activity for year, average interest rate for year |  |  |  |  |  | 4.62% |  |  |  |  |  |  |  |
Federal home loan bank, advances, general debt obligations, disclosures, collateral pledged |  |  |  |  |  | $ 263,400,000 |  |  |  |  |  |  |  |
Federal home loan bank, advances, general debt obligations, amount of available, unused funds |  |  |  |  |  | 71,400,000 |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  |  |  |  | 519,000 |  |  |  |  |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  | 177,000 | 38,000 | $ 111,000 |  |  |  |  |  |
Number of investors | investor | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated debt, net |  |  |  |  |  | 9,869,000 | 9,840,000 |  |  |  |  |  |  |
Interest on subordinated debt |  |  |  |  |  | 1,481,000 | 1,066,000 | 933,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | 201,624,000 |  |  |  |  |  |  |  |
Federal Reserve Bank Advances |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  | 48,000 |  |  |  |  |  |  |  |
Financial instruments, owned, at fair value |  |  |  |  |  | 15,500,000 |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Federal Reserve Bank Advances | Asset Pledged as Collateral with Right |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments, owned, at fair value |  |  |  |  |  | 11,400,000 |  |  |  |  |  |  |  |
FRBNY's Borrower-in-Custody |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |
Short-term debt |  |  |  |  |  | 12,000,000 | 0 | 0 |  |  |  |  |  |
Bank Term Funding Program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  | 1,800,000 |  |  |  |  |  |  |  |
Short-term debt |  |  |  |  |  | $ 70,000,000 |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated |  |  |  |  |  | 4.89% |  |  |  |  |  |  |  |
Bank Term Funding Program | Asset Pledged as Collateral with Right |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments, owned, at fair value |  |  |  |  |  | $ 72,400,000 |  |  |  | $ 80,000,000 |  |  |  |
Correspondent Bank Agreement | Zions Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | 17,000,000 | 24,500,000 |  |  |  |  |  |  |
Long-term line of credit, total |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  | 117,000 | 0 | 0 |  |  |  |  |  |
Federal Home Loan Bank Borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |
Long-term line of credit, total |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  | $ 4,200,000 | 3,500,000 | 3,000,000 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal home loan bank, advances, branch of FHLB bank, interest rate |  |  |  |  |  | 2.40% |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal home loan bank, advances, branch of FHLB bank, interest rate |  |  |  |  |  | 5.56% |  |  |  |  |  |  |  |
FHLB and FRB Borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | $ 171,000,000 |  |  |  |  |  |  |  |
Long term debt, additional available amount |  |  |  |  |  | 71,400,000 |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | $ 171,000,000 |  |  |  |  |  |  |  |
FHLB and FRB Borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term (in years) |  |  |  |  |  | 2 days |  |  |  |  |  |  |  |
FHLB and FRB Borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term (in years) |  |  |  |  |  | 9 months 18 days |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | $ 11,723,000 |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 12,000,000 |  | $ 12,000,000 |
Debt instrument, interest rate, stated |  |  |  |  |  |  |  |  |  |  | 8.50% |  | 7.00% |
Debt issuance costs, net |  |  |  |  |  | 277,000 |  |  |  |  | $ 360,000 |  |  |
Interest expense, long-term debt |  |  |  |  |  | 1,200,000 | 866,000 | 913,000 |  |  |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  | 139,000 | 0 | 73,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | 12,000,000 |  |  |  |  |  |  |  |
Senior Notes | July 1, 2022 until September 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated |  |  |  |  |  |  |  |  |  |  |  | 7.25% |  |
Senior Notes | After September 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated |  |  |  |  |  |  |  |  |  |  |  | 7.50% |  |
Senior Notes | Accrued Expenses and Other Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest payable |  |  |  |  |  | 470,000 | 28,000 |  |  |  |  |  |  |
Subordinated notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated | 6.25% |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated notes | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 3.325% |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | 9,869,000 |  |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  | 786,000 | 654,000 | 654,000 |  |  |  |  |  |
Debt issuance costs, net | $ 291,000 |  |  |  |  | 131,000 | 160,000 |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |
Junior Subordinated Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | 8,137,000 |  |  |  |  |  |  |  |
Interest expense, debt, total |  | $ 700,000 |  | $ 1,700,000 |  |  |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  |  |  |  | 111,000 | 120,000 |  |  |  |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  | 9,000 | 9,000 | 9,000 |  |  |  |  |  |
Interest payable |  |  |  |  |  | $ 12,000 | 9,000 |  |  |  |  |  |  |
Subordinated debt, net |  |  |  |  |  |  |  |  | $ 8,000,000 |  |  |  |  |
Payments of debt issuance costs |  |  |  |  |  |  |  |  | $ 240,000 |  |  |  |  |
Excess tier one risk based capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25
Debt, weighted average interest rate |  |  |  |  |  | 8.77% |  |  |  |  |  |  |  |
Number of consecutive quarters for interest deferment | quarter |  |  |  |  | 20 |  |  |  |  |  |  |  |  |
Interest on subordinated debt |  |  |  |  |  | $ 695,000 | 412,000 | 279,000 |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | $ 8,248,000 |  |  |  |  |  |  |  |
Junior Subordinated Debt | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  | 3.15% |  |  |  |  |  |  |  |
Note Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  | $ 376,000 |  |  |  |  |  |  |  |
Debt instrument, term (in years) |  |  | 9 years |  |  |  |  |  |  |  |  |  |  |
Interest expense, debt, total |  |  |  |  |  | 8,000 | 12,000 | $ 15,000 |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated |  |  | 1.75% |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  | $ 376,000 | $ 585,000 |  |  |  |  |  |  |
Debt instrument, periodic payment terms, balloon payment to be paid |  |  | $ 234,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + 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 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 4: 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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