Quarterly report pursuant to Section 13 or 15(d)

Investment Securities - Additional Information (Details)

v3.20.2
Investment Securities - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Security
Sep. 30, 2019
USD ($)
Security
Sep. 30, 2020
USD ($)
Security
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Investments Debt And Equity Securities [Abstract]          
Taxable interest and dividends on investment securities $ 443,000 $ 998,000 $ 1,300,000 $ 3,200,000  
Tax-exempt interest on investment securities 22,000 $ 146,000 98,000 411,000  
Available for sale securities pledged $ 52,500,000   $ 52,500,000   $ 90,600,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List] us-gaap:CollateralPledgedMember   us-gaap:CollateralPledgedMember   us-gaap:CollateralPledgedMember
Available for sale, securities number of positions | Security 69   69    
Available for sale, securities in unrealized loss positions, number of positions | Security 21   21    
Available for sale, securities in unrealized loss positions, number of positions, more than 12 months | Security 0   0    
Available for sale securities, gross realized gain (loss), excluding other than temporary impairments     $ 0    
Sales of investment securities available for sale $ 34,000,000.0   34,023,000 79,920,000  
Gross realized gains $ 1,000,000.0   $ 1,000,000.0 $ 2,100,000  
Number of securities sold | Security   0