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Investment Securities - Additional information (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) position security | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) security
Investment Securities: |  |  |
Held to maturity securities, fair value | $ 59,180,000 |  | $ 58,621,000
Equity securities | $ 337,000 |  | $ 499,000
The weighted average duration of the total investment securities portfolio | 49 months 18 days |  | 49 months 12 days
Proceeds from sales of investment securities - available for sale | $ 435,000 | $ 0 |
Book value of securities available for sale and held to maturity | 134,516,000 |  | $ 135,624,000
Accrued interest receivable on available for sale debt securities | $ 1,200,000 |  | 988,000
Premium percentage on mortgage backed securities purchased | 100.80% |  |
Unrealized loss on equity securities | $ 0 |  |
Held to maturity, allowance for credit losses | 90,000 | 83,000 | 37,000
Accrued interest receivable on held to maturity debt securities | 439,000 |  | 388,000
Held to maturity debt securities in non-accrual | 0 |  | 0
Provision for credit losses recovery on available for sale debt securities recorded | 319,000 | 926,000 |
Charge-off resulted from sale of securities | 491,000 |  |
Available for Sale Securities, allowance for credit losses | $ 116,000 | 926,000 | $ 926,000
Number of available for sale debt securities in non accrual status | security | 0 |  | 1
Available-for-Sale debt securities in non-accrual |  |  | $ 926,000
Percentage of unrealized loss position for less than 12 months | 1.00% |  |
Percentage of unrealized loss position for greater than 12 months | 11.80% |  |
Assets | $ 1,384,516,000 |  | 1,389,638,000
Net income | 1,904,000 | 1,515,000 |
U.S. Agency |  |  |
Investment Securities: |  |  |
Held to maturity securities, fair value | 2,109,000 |  | 2,121,000
Held to maturity, allowance for credit losses | $ 0 |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 7 |  |
U.S. Agency mortgage-backed securities |  |  |
Investment Securities: |  |  |
Held to maturity securities, fair value | $ 22,942,000 |  | 22,213,000
Held to maturity, allowance for credit losses | $ 0 |  |
Unrealized loss position for less than 12 months, Number of positions | position | 8 |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 138 |  |
Municipal |  |  |
Investment Securities: |  |  |
Held to maturity securities, fair value | $ 29,870,000 |  | 29,990,000
Held to maturity, allowance for credit losses | $ 2,000 | 3,000 | 2,000
Unrealized loss position for greater than 12 months, Number of positions | position | 31 |  |
Corporate bonds. |  |  |
Investment Securities: |  |  |
Provision for credit losses recovery on available for sale debt securities recorded | $ 319,000 | 926,000 |
Charge-off resulted from sale of securities | 491,000 |  |
Available for Sale Securities, allowance for credit losses | $ 116,000 | $ 926,000 | $ 926,000
Unrealized loss position for less than 12 months, Number of positions | position | 1 |  |
Unrealized loss position for greater than 12 months, Number of positions | position | 85 |  |
Subordinated debt investment |  |  |
Investment Securities: |  |  |
Charge-off resulted from sale of securities | $ 491,000 |  |
Provision for credit losses recovery recognized | $ 435,000 |  |
AAA/AA/A. |  |  |
INVESTMENT SECURITIES |  |  |
Portfolio rated | 56.60% |  | 55.90%
Securities rated below A |  |  |
INVESTMENT SECURITIES |  |  |
Portfolio rated | 14.30% |  | 15.10%
Maximum |  |  |
Investment Securities: |  |  |
The weighted average duration of the total investment securities portfolio | 60 months |  |

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