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Borrowed Funds (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Disclosure of Repurchase Agreements [Abstract]                
Amount of line of credit with correspondent banks $ 51,000              
Credit facility with Federal Reserve Bank $ 95,000              
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]                
Interest rate, due in year two 0.00% 155.00%            
Interest rate, due in year three 0.00% 0.00%            
Interest rate, due in year four 0.00% 0.00%            
Interest rate, due in year five   0.00%            
Interest rate, due in year six and thereafter 0.00% 0.00%            
Due in twelve months maturity $ 137,600 $ 137,400            
Due in year two maturity 0 10,000            
Due in year three maturity 0 0            
Due in year four maturity 98 0            
Due in year five maturity 55,000 105            
Due thereafter 0 0            
Total 192,698 147,505            
Repurchase agreements for municipal and commercial customers 69,340 37,450            
Total $ 262,038 $ 184,955 $ 283,787 $ 278,805 $ 248,040 $ 181,417 $ 181,858 $ 170,419
Minimum                
Disclosure of Repurchase Agreements [Abstract]                
Range of repurchase agreements' maturity dates (days) 1 day              
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]                
Interest rate, due in next twelve months 0.00% 1.60%            
Interest rate, due in year five 1.35%              
Interest rate, Repurchase agreements for municipal and commercial customers 0.10% 0.10%            
Maximum                
Disclosure of Repurchase Agreements [Abstract]                
Range of repurchase agreements' maturity dates (days) 365 days              
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]                
Interest rate, due in next twelve months 1.55% 1.97%            
Interest rate, due in year five 1.40%              
Interest rate, Repurchase agreements for municipal and commercial customers 2.00% 2.33%