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Investment Securities - Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | $ 138,513 | $ 141,883
Available-for-sale, gross unrealized gains | 7 | 8
Available-for-sale, gross unrealized losses | (11,513) | (11,096)
Investment securities available-for-sale, at fair value | 127,007 | 130,795
Held-to-maturity, amortized cost | 1,682 | 1,862
Held-to-maturity, gross unrealized losses | (83) | (93)
Held-to-maturity, estimated fair value | 1,599 | 1,769
Residential Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 45,498 | 47,659
Available-for-sale, gross unrealized gains | 2 | 2
Available-for-sale, gross unrealized losses | (3,546) | (3,704)
Investment securities available-for-sale, at fair value | 41,954 | 43,957
Commercial Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 11,476 | 12,169
Available-for-sale, gross unrealized gains | 5 | 4
Available-for-sale, gross unrealized losses | (499) | (480)
Investment securities available-for-sale, at fair value | 10,982 | 11,693
Held-to-maturity, amortized cost | 1,003 | 1,167
Held-to-maturity, gross unrealized losses | (31) | (41)
Held-to-maturity, estimated fair value | 972 | 1,126
US Government Agencies Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 5,114 | 5,116
Available-for-sale, gross unrealized losses | (739) | (846)
Investment securities available-for-sale, at fair value | 4,375 | 4,270
Held-to-maturity, amortized cost | 601 | 610
Held-to-maturity, gross unrealized losses | (42) | (40)
Held-to-maturity, estimated fair value | 559 | 570
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 1,655 | 2,166
Available-for-sale, gross unrealized losses | (81) | (94)
Investment securities available-for-sale, at fair value | 1,574 | 2,072
Held-to-maturity, amortized cost | 78 | 85
Held-to-maturity, gross unrealized losses | (10) | (12)
Held-to-maturity, estimated fair value | 68 | 73
Corporate Notes [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 17,803 | 17,817
Available-for-sale, gross unrealized gains |  | 2
Available-for-sale, gross unrealized losses | (3,149) | (1,898)
Investment securities available-for-sale, at fair value | 14,654 | 15,921
US Treasury Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 56,967 | 56,956
Available-for-sale, gross unrealized losses | (3,499) | (4,074)
Investment securities available-for-sale, at fair value | $ 53,468 | $ 52,882

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