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Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Amortized Cost | $ 137,465 | $ 122,492
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value | 3,626 | 4,190
Available-for-sale securities, Gross Unrealized Gains | 2,254 | 577
Available-for-sale securities, Gross Unrealized Losses | 151 | 278
Available-for-sale, at fair value | 139,568 | 122,791
Held-to-maturity Securities, Amortized Cost | 65,706 | 8,786
Held-to-maturity securities, Gross Unrealized Gains | 185 | 1
Held-to-maturity securities, Gross Unrealized Losses | 63 | 133
Held-to-maturity securities, Estimated Fair Value | 65,828 | 8,654
Equity securities, at fair value | 1,395 | 1,342
Accounting Standards Update 2016-01 |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Equity securities, at fair value | 1,400 | 1,300
Accounting Standards Update 2016-01 | Revision of Prior Period, Change in Accounting Principle, Adjustment [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Fair value adjustment recorded through earnings | 28 | 42
Collateral Pledged [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Amortized Cost | 60,600 | 66,904
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value | 61,094 | 67,142
U.S. Government Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Amortized Cost | 23,600 | 23,854
Available-for-sale securities, Gross Unrealized Gains | 20 | 3
Available-for-sale securities, Gross Unrealized Losses | 83 | 31
Available-for-sale, at fair value | 23,537 | 23,826
Held-to-maturity Securities, Amortized Cost | 18,893 | 1,386
Held-to-maturity securities, Gross Unrealized Gains | 38 |
Held-to-maturity securities, Gross Unrealized Losses | 43 | 5
Held-to-maturity securities, Estimated Fair Value | 18,888 | 1,381
States and Political Subdivisions [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Held-to-maturity Securities, Amortized Cost | 400 | 400
Held-to-maturity securities, Gross Unrealized Gains | 1 | 1
Held-to-maturity securities, Estimated Fair Value | 401 | 401
Mortgage-backed [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Amortized Cost | 113,865 | 98,638
Available-for-sale securities, Gross Unrealized Gains | 2,234 | 574
Available-for-sale securities, Gross Unrealized Losses | 68 | 247
Available-for-sale, at fair value | 116,031 | 98,965
Held-to-maturity Securities, Amortized Cost | 27,347 |
Held-to-maturity securities, Gross Unrealized Gains | 7 |
Held-to-maturity securities, Gross Unrealized Losses | 18 |
Held-to-maturity securities, Estimated Fair Value | 27,336 |
Other debt securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Held-to-maturity Securities, Amortized Cost | 19,066 | 7,000
Held-to-maturity securities, Gross Unrealized Gains | 139 |
Held-to-maturity securities, Gross Unrealized Losses | 2 | 128
Held-to-maturity securities, Estimated Fair Value | $ 19,203 | $ 6,872

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