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Borrowings - Subordinated Debt (Details)
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2003
USD ($)
trust
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]          
Net proceeds from sale of common stock under employee stock purchase program $ 723,000 $ 1,212,000 $ 1,480,000    
Subordinated debt, net          
Debt Instrument [Line Items]          
Number of separate trusts | trust       2  
Long-term debt, term 30 years        
Subordinated debt, net | Floating Rate Trust Preferred Securities Trust I          
Debt Instrument [Line Items]          
Preferred securities issued to form the trust       $ 9,000,000  
Issuance of subordinated debt, net of issuance costs       9,280,000  
Net proceeds from sale of common stock under employee stock purchase program       280,000  
Subordinated debt, net | Floating Rate Trust Preferred Securities Trust II          
Debt Instrument [Line Items]          
Preferred securities issued to form the trust       21,000,000  
Issuance of subordinated debt, net of issuance costs       21,650,000  
Net proceeds from sale of common stock under employee stock purchase program       $ 650,000  
Subordinated debt, net | Fixed To Floating Rate Note          
Debt Instrument [Line Items]          
Debt instrument, face amount         $ 100,000,000
Long-term debt, term         10 years