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Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 9,000
Available for sale, Amortized Cost, Due after one year through five years	1,610
Available for sale, Amortized Cost, Due after five years through ten years	57,727
Available for sale, Amortized Cost, Due after ten years	68,392
Available-for-sale securities, Amortized Cost	136,729	$ 122,492
Available for sale, Estimated Fair Value, Due in one year or less	9,051
Available for sale, Estimated Fair Value, Due after one year through five years	1,664
Available for sale, Estimated Fair Value, Due after five years through ten years	59,491
Available for sale, Estimated Fair Value, Due after ten years	69,143
Available-for-sale Securities, Debt Securities, Total	139,349	122,791
Held to maturity securities, Amortized Cost, Due after one year through five years	2,951
Held to maturity securities, Amortized Cost, Due after five years through ten years	16,028
Held to maturity securities, Amortized Cost, Due after ten years	1,195
Held-to-maturity Securities, Amortized Cost	20,174	8,786
Held to maturity securities, Estimated Fair Value, Due after one year through five years	2,927
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	16,092
Held to maturity securities, Estimated Fair Value, Due after ten years	1,235
Held-to-maturity Securities, Fair Value, Total	$ 20,254	$ 8,654

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