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Investment Securities Held-to-maturity Securities with Unrealized Loss (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
securities
Dec. 31, 2018
USD ($)
securities
Schedule of Held-to-maturity Securities    
Fair value of securities in unrealized loss position less than 12 months $ 9,397 $ 0
Unrealized loss less than 12 months $ 68 $ 0
Number of securities at an unrealized loss position less than 12 months | securities 2 0
Fair value of securities in unrealized loss more than 12 months $ 890 $ 16,566
Unrealized loss more than 12 months $ 27 $ 682
Number of securities at an unrealized loss position more than 12 months | securities 1 6
Total fair value $ 10,287 $ 16,566
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 95 682
States and political subdivisions    
Schedule of Held-to-maturity Securities    
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Residential mortgage-backed securities    
Schedule of Held-to-maturity Securities    
Fair value of securities in unrealized loss position less than 12 months 7,731 0
Unrealized loss less than 12 months $ 67 $ 0
Number of securities at an unrealized loss position less than 12 months | securities 1 0
Fair value of securities in unrealized loss more than 12 months $ 890 $ 13,102
Unrealized loss more than 12 months $ 27 $ 632
Number of securities at an unrealized loss position more than 12 months | securities 1 5
Total fair value $ 8,621 $ 13,102
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 94 632
Commercial mortgage-backed securities    
Schedule of Held-to-maturity Securities    
Fair value of securities in unrealized loss position less than 12 months 1,666 0
Unrealized loss less than 12 months $ 1 $ 0
Number of securities at an unrealized loss position less than 12 months | securities 1 0
Fair value of securities in unrealized loss more than 12 months $ 0 $ 3,464
Unrealized loss more than 12 months $ 0 $ 50
Number of securities at an unrealized loss position more than 12 months | securities 0 1
Total fair value $ 1,666 $ 3,464
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss $ 1 $ 50