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Investment Securities - Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | $ 139,514 | $ 130,676
Available-for-sale, gross unrealized gains | 342 | 977
Available-for-sale, gross unrealized losses | (4,838) | (770)
Investment securities available-for-sale, at fair value | 135,018 | 130,883
Held-to-maturity, amortized cost | 2,718 | 3,436
Held-to-maturity, gross unrealized gains |  | 41
Held-to-maturity, gross unrealized losses | (32) |
Held-to-maturity, estimated fair value | 2,686 | 3,477
Residential Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 46,121 | 46,020
Available-for-sale, gross unrealized gains | 81 | 450
Available-for-sale, gross unrealized losses | (1,620) | (242)
Investment securities available-for-sale, at fair value | 44,582 | 46,228
Commercial Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 22,089 | 24,647
Available-for-sale, gross unrealized gains | 195 | 371
Available-for-sale, gross unrealized losses | (148) | (47)
Investment securities available-for-sale, at fair value | 22,136 | 24,971
Held-to-maturity, amortized cost | 1,821 | 2,115
Held-to-maturity, gross unrealized gains |  | 29
Held-to-maturity, gross unrealized losses | (9) |
Held-to-maturity, estimated fair value | 1,812 | 2,144
US Government Agencies Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 5,158 | 5,207
Available-for-sale, gross unrealized losses | (357) | (15)
Investment securities available-for-sale, at fair value | 4,801 | 5,192
Held-to-maturity, amortized cost | 758 | 768
Held-to-maturity, gross unrealized gains |  | 10
Held-to-maturity, gross unrealized losses | (19) |
Held-to-maturity, estimated fair value | 739 | 778
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 4,228 | 4,247
Available-for-sale, gross unrealized gains | 20 | 80
Available-for-sale, gross unrealized losses | (66) | (10)
Investment securities available-for-sale, at fair value | 4,182 | 4,317
Held-to-maturity, amortized cost | 139 | 553
Held-to-maturity, gross unrealized gains |  | 2
Held-to-maturity, gross unrealized losses | (4) |
Held-to-maturity, estimated fair value | 135 | 555
Corporate Notes [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 19,875 | 15,458
Available-for-sale, gross unrealized gains | 46 | 76
Available-for-sale, gross unrealized losses | (526) | (52)
Investment securities available-for-sale, at fair value | 19,395 | 15,482
US Treasury Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, amortized cost | 42,043 | 35,097
Available-for-sale, gross unrealized losses | (2,121) | (404)
Investment securities available-for-sale, at fair value | $ 39,922 | $ 34,693

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