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Investment Securities - Information concerning investments with unrealized losses (Details) - USD ($) | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
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Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |  |  |  |  |
Less than 12 months, Fair Value | $ 13,269,000 |  | $ 25,604,000 |  |  |
Less than 12 months, Unrealized Losses | (614,000) |  | (950,000) |  |  |
12 months or longer, Fair Value | 102,638,000 |  | 110,722,000 |  |  |
12 months or longer, Unrealized Losses | (13,070,000) |  | (16,113,000) |  |  |
Total, Fair Value | 115,907,000 |  | 136,326,000 |  |  |
Total, Unrealized Losses | (13,684,000) |  | (17,063,000) |  |  |
Allowance for credit losses | 1,000,000 | $ 1,000,000 | 360,000 | $ 360,000 | $ 116,000 | $ 926,000
U.S. Agency |  |  |  |  |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |  |  |  |  |
12 months or longer, Fair Value | 4,772,000 |  | 4,666,000 |  |  |
12 months or longer, Unrealized Losses | (484,000) |  | (679,000) |  |  |
Total, Fair Value | 4,772,000 |  | 4,666,000 |  |  |
Total, Unrealized Losses | (484,000) |  | (679,000) |  |  |
U.S. Agency mortgage-backed securities |  |  |  |  |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |  |  |  |  |
Less than 12 months, Fair Value | 8,599,000 |  | 16,104,000 |  |  |
Less than 12 months, Unrealized Losses | (100,000) |  | (275,000) |  |  |
12 months or longer, Fair Value | 60,829,000 |  | 63,323,000 |  |  |
12 months or longer, Unrealized Losses | (10,587,000) |  | (12,508,000) |  |  |
Total, Fair Value | 69,428,000 |  | 79,427,000 |  |  |
Total, Unrealized Losses | (10,687,000) |  | (12,783,000) |  |  |
Municipal |  |  |  |  |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |  |  |  |  |
12 months or longer, Fair Value | 7,744,000 |  | 8,121,000 |  |  |
12 months or longer, Unrealized Losses | (475,000) |  | (670,000) |  |  |
Total, Fair Value | 7,744,000 |  | 8,121,000 |  |  |
Total, Unrealized Losses | (475,000) |  | (670,000) |  |  |
Corporate bonds |  |  |  |  |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |  |  |  |  |
Less than 12 months, Fair Value | 4,670,000 |  | 9,500,000 |  |  |
Less than 12 months, Unrealized Losses | (514,000) |  | (675,000) |  |  |
12 months or longer, Fair Value | 29,293,000 |  | 34,612,000 |  |  |
12 months or longer, Unrealized Losses | (1,524,000) |  | (2,256,000) |  |  |
Total, Fair Value | 33,963,000 |  | 44,112,000 |  |  |
Total, Unrealized Losses | (2,038,000) |  | (2,931,000) |  |  |
Allowance for credit losses | 1,000,000 | $ 1,000,000 | $ 360,000 | $ 360,000 | $ 116,000 | $ 926,000
US Government Agencies Debt Securities and Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise and Municipal Bonds and Corporate bonds |  |  |  |  |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |  |  |  |  |
Allowance for credit losses | $ 0 |  |  |  |  |

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