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Investment Securities (Tables)
 9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
The amortized cost and estimated fair values of investment securities

The amortized cost and estimated fair values of investment securities are summarized below:

 
Investment Securities
AVAILABLE-FOR-SALE:         Gross     Gross        
    Amortized     Unrealized     Unrealized        
(Dollars in thousands)   Cost     Gains     Losses     Fair Value  
September 30, 2020                                
US Treasury securities   $ 1,503     $ 7     $ —     $ 1,510  
Government Sponsored Enterprises     993       17       —       1,010  
Mortgage-backed securities     171,441       7,763       154       179,050  
Small Business Administration pools     36,369       922       19       37,272  
State and local government     66,101       5,254       —       71,355  
Corporate and Other securities     3,273       10       8       3,275  
    $ 279,680     $ 13,973     $ 181     $ 293,472  
                                 
       Gross   Gross     
   Amortized   Unrealized   Unrealized     
(Dollars in thousands)  Cost   Gains   Losses   Fair Value 
December 31, 2019                    
US Treasury securities  $7,190   $16   $3   $7,203 
Government Sponsored Enterprises   984    17    —    1,001 
Mortgage-backed securities   182,736    1,490    640    183,586 
Small Business Administration pools   45,301    259    217    45,343 
State and local government   47,418    2,371    141    49,648 
Other securities   19    —    —    19 
   $283,648   $4,153   $1,001   $286,800 
The following tables show gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous loss position

The following tables show gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous loss position, at September 30, 2020 and December 31, 2019.

  
Investment Securities (Details 2)
                                                 
(Dollars in thousands)   Less than 12 months     12 months or more     Total  
September 30, 2020   Fair     Unrealized     Fair     Unrealized     Fair     Unrealized  
Available-for-sale securities:   Value     Loss     Value     Loss     Value     Loss  
                                     
Mortgage-backed securities   $ 22,050     $ 103     $ 5,601     $ 51     $ 27,651     $ 154  
Small Business Administration pools     1,213       2       3,434       17       4,647       19  
State and local government     1,009       —       —       —       1,009       —  
Corporate and Other Securities     1,275       8       —       —       1,275       8  
Total   $ 25,547     $ 113     $ 9,035     $ 68     $ 34,582     $ 181  
                                                 
(Dollars in thousands)   Less than 12 months     12 months or more     Total  
December 31, 2019   Fair     Unrealized     Fair     Unrealized     Fair     Unrealized  
Available-for-sale securities:   Value     Loss     Value     Loss     Value     Loss  
                                     
US Treasury securities   $ —     $ —     $ 1,508     $ 3     $ 1,508     $ 3  
Mortgage-backed securities     57,175       485       12,419       155       69,594       640  
Small Business Administration pools     7,891       53       13,502       164       21,393       217  
State and local government     5,695       141       —       —       5,695       141  
Total   $ 70,761     $ 679     $ 27,429     $ 322     $ 98,190     $ 1,001  
The following sets forth the amortized cost and fair value of investment securities at September 30, 2020 by contractual maturity. Expected maturities differ from contractual maturities because borrowers may have the right to call or prepay the obligations with or without prepayment penalties. MBSs are based on average life at estimated prepayment speeds.

The following sets forth the amortized cost and fair value of investment securities at September 30, 2020 by contractual maturity. Expected maturities differ from contractual maturities because borrowers may have the right to call or prepay the obligations with or without prepayment penalties. MBSs are based on average life at estimated prepayment speeds.

 

 
Investment Securities (Details 3)
September 30, 2020   Available-for-sale  
    Amortized     Fair  
(Dollars in thousands)   Cost     Value  
Due in one year or less   $ 10,573     $ 10,661  
Due after one year through five years     131,512       136,138  
Due after five years through ten years     116,467       124,866  
Due after ten years     21,128       21,807  
Total   $ 279,680     $ 293,472