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Investment Securities (Tables)
 6 Months Ended
Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment Available-For-Sale

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

 

 

AVAILABLE-FOR-SALE:

 
Investment Securities
       Gross   Gross     
   Amortized   Unrealized   Unrealized     
(Dollars in thousands)  Cost   Gains   Losses   Fair Value 
June 30, 2021                    
US Treasury securities  $15,722   $—   $274   $15,448 
Mortgage-backed securities   317,506    5,377    1,642    321,241 
Small Business Administration pools   35,558    728    61    36,225 
State and local government   84,216    5,417    295    89,338 
Corporate and other securities   6,525    174    —    6,699 
   $459,527   $11,696   $2,272   $468,951 
                     
       Gross   Gross     
   Amortized   Unrealized   Unrealized     
(Dollars in thousands)  Cost   Gains   Losses   Fair Value 
December 31, 2020                    
US Treasury securities  $1,501   $1   $—   $1,502 
Government Sponsored Enterprises   996    10    —    1,006 
Mortgage-backed securities   222,739    7,375    185    229,929 
Small Business Administration pools   34,577    928    7    35,498 
State and local government   82,495    6,184    76    88,603 
Corporate and other securities   3,272    56    —    3,328 
   $345,580   $14,554   $268   $359,866 
Schedule of 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 June 30, 2021 and December 31, 2020.

 
Investment Securities (Details 2)
(Dollars in thousands)  Less than 12 months   12 months or more   Total 
June 30, 2021  Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
Available-for-sale securities:  Value   Loss   Value   Loss   Value   Loss 
                         
US Treasury Securities  $15,448   $274   $—   $—   $15,448   $274 
Mortgage-backed securities   145,058    1,564    12,170    78    157,228    1,642 
Small Business Administration pools   6,151    61    943    —    7,094    61 
State and local government   13,977    295    —    —    13,977    295 
Total  $180,634   $2,194   $13,113   $78   $193,747   $2,272 
                               
(Dollars in thousands)  Less than 12 months   12 months or more   Total 
December 31, 2020  Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
Available-for-sale securities:  Value   Loss   Value   Loss   Value   Loss 
                         
Mortgage-backed securities   21,298    152    1,414    33    22,712    185 
Small Business Administration pools   —    —    1,323    7    1,323    7 
State and local government   4,930    76    —    —    4,930    76 
Total  $26,228   $228   $2,737   $40   $28,965   $268 
Schedule of the amortized cost and fair value of investment securities by expected maturity

The following sets forth the amortized cost and fair value of investment securities at June 30, 2021 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)
   Available-for-sale 
June 30, 2021  Amortized   Fair 
(Dollars in thousands)  Cost   Value 
Due in one year or less  $15,519   $15,768 
Due after one year through five years   159,613    163,332 
Due after five years through ten years   162,819    168,061 
Due after ten years   121,576    121,790 
Total  $459,527   $468,951