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Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale securities, Amortized Cost $ 123,075   $ 137,465
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value 3,189   3,626
Available-for-sale securities, Gross Unrealized Gains 2,035   2,254
Available-for-sale securities, Gross Unrealized Losses 1,007   151
Available-for-sale, at fair value 124,103   139,568
Held-to-maturity Securities, Amortized Cost 125,929   65,706
Held-to-maturity securities, Gross Unrealized Gains 313   185
Held-to-maturity securities, Gross Unrealized Losses 1,166   63
Held-to-maturity securities, Estimated Fair Value 125,076   65,828
Equity securities, at fair value 1,382   1,395
Accounting Standards Update 2016-01      
Schedule of Available-for-sale Securities [Line Items]      
Equity securities, at fair value 1,400   1,400
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 (18) $ 1  
U.S. Government Agencies [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale securities, Amortized Cost 18,583   23,600
Available-for-sale securities, Gross Unrealized Gains 4   20
Available-for-sale securities, Gross Unrealized Losses 438   83
Available-for-sale, at fair value 18,149   23,537
Held-to-maturity Securities, Amortized Cost 38,409   18,893
Held-to-maturity securities, Gross Unrealized Gains 12   38
Held-to-maturity securities, Gross Unrealized Losses 423   43
Held-to-maturity securities, Estimated Fair Value 37,998   18,888
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 104,492   113,865
Available-for-sale securities, Gross Unrealized Gains 2,031   2,234
Available-for-sale securities, Gross Unrealized Losses 569   68
Available-for-sale, at fair value 105,954   116,031
Held-to-maturity Securities, Amortized Cost 68,067   27,347
Held-to-maturity securities, Gross Unrealized Gains 74   7
Held-to-maturity securities, Gross Unrealized Losses 700   18
Held-to-maturity securities, Estimated Fair Value 67,441   27,336
Other debt securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Held-to-maturity Securities, Amortized Cost 19,053   19,066
Held-to-maturity securities, Gross Unrealized Gains 226   139
Held-to-maturity securities, Gross Unrealized Losses 43   2
Held-to-maturity securities, Estimated Fair Value $ 19,236   $ 19,203