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Securities - Narrative (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
Security
Dec. 31, 2019
USD ($)
Debt Securities, Available-for-sale [Line Items]    
Carrying value of securities pledged as collateral as required by law on public and trust deposits, repurchase agreements, and for other purposes | $ $ 283,258 $ 162,946
U.S. Government and agencies    
Debt Securities, Available-for-sale [Line Items]    
Available for sale securities in unrealized loss positions 10  
Available for sale securities in unrealized loss positions, percentage of amortized cost (individually did not exceed) 1.00%  
Mortgage-backed securities, residential    
Debt Securities, Available-for-sale [Line Items]    
Available for sale securities in unrealized loss positions 10  
Available for sale securities in unrealized loss positions, percentage of amortized cost (individually did not exceed) 3.00%  
State and municipal    
Debt Securities, Available-for-sale [Line Items]    
Available for sale securities in unrealized loss positions 16  
Available for sale securities in unrealized loss positions, percentage of amortized cost (individually did not exceed) 3.00%  
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Available for sale securities in unrealized loss positions 2  
Available for sale securities in unrealized loss positions, percentage of amortized cost (individually did not exceed) 1.00%