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Securities - Unrealized Loss Positions (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
security
Dec. 31, 2019
USD ($)
Fair value    
Less Than 12 Months, Fair Value $ 37,791 $ 19,542
12 Months or More, Fair Value 0 15,628
Total Fair Value 37,791 35,170
Unrealized Loss    
Less Than 12 Months, Unrealized Loss 204 71
12 Months or More, Unrealized Loss 0 48
Total Unrealized Loss $ 204 119
Other information    
Number of positions considered temporarily impaired | security 31  
Debt securities considered temporarily impaired $ 37,791 35,170
Other than temporary impairment 0  
U.S. government agencies and corporations    
Fair value    
Less Than 12 Months, Fair Value 12,719 6,256
12 Months or More, Fair Value   4,094
Total Fair Value 12,719 10,350
Unrealized Loss    
Less Than 12 Months, Unrealized Loss 10 11
12 Months or More, Unrealized Loss   6
Total Unrealized Loss 10 17
Other information    
Debt securities considered temporarily impaired 12,719 10,350
Mortgage-backed securities    
Fair value    
Less Than 12 Months, Fair Value 15,691 4,099
12 Months or More, Fair Value   10,166
Total Fair Value 15,691 14,265
Unrealized Loss    
Less Than 12 Months, Unrealized Loss 115 7
12 Months or More, Unrealized Loss   36
Total Unrealized Loss 115 43
Other information    
Debt securities considered temporarily impaired 15,691 14,265
Obligations of states and political subdivisions    
Fair value    
Less Than 12 Months, Fair Value 5,110 9,187
12 Months or More, Fair Value   1,368
Total Fair Value 5,110 10,555
Unrealized Loss    
Less Than 12 Months, Unrealized Loss 36 53
12 Months or More, Unrealized Loss   6
Total Unrealized Loss 36 59
Other information    
Debt securities considered temporarily impaired 5,110 $ 10,555
Corporate and other debt securities    
Fair value    
Less Than 12 Months, Fair Value 4,271  
Total Fair Value 4,271  
Unrealized Loss    
Less Than 12 Months, Unrealized Loss 43  
Total Unrealized Loss 43  
Other information    
Debt securities considered temporarily impaired $ 4,271