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Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale securities, Amortized Cost $ 136,729   $ 122,492
Available-for-sale securities, Gross Unrealized Gains 2,784   577
Available-for-sale securities, Gross Unrealized Losses 164   278
Available-for-sale, at fair value 139,349   122,791
Held-to-maturity Securities, Amortized Cost 20,174   8,786
Held-to-maturity securities, Gross Unrealized Gains 120   1
Held-to-maturity securities, Gross Unrealized Losses 40   133
Held-to-maturity securities, Estimated Fair Value 20,254   8,654
Equity securities, at fair value 1,396   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 34 $ 47  
U.S. Government Agencies [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale securities, Amortized Cost 24,661   23,854
Available-for-sale securities, Gross Unrealized Gains 54   3
Available-for-sale securities, Gross Unrealized Losses 83   31
Available-for-sale, at fair value 24,632   23,826
Held-to-maturity Securities, Amortized Cost 1,195   1,386
Held-to-maturity securities, Gross Unrealized Gains 40    
Held-to-maturity securities, Gross Unrealized Losses     5
Held-to-maturity securities, Estimated Fair Value 1,235   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
Collateralized Mortgage Backed Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale securities, Amortized Cost 112,068   98,638
Available-for-sale securities, Gross Unrealized Gains 2,730   574
Available-for-sale securities, Gross Unrealized Losses 81   247
Available-for-sale, at fair value 114,717   98,965
Other debt securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Held-to-maturity Securities, Amortized Cost 18,579   7,000
Held-to-maturity securities, Gross Unrealized Gains 79    
Held-to-maturity securities, Gross Unrealized Losses 40   128
Held-to-maturity securities, Estimated Fair Value $ 18,618   $ 6,872