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Investment Securities (Tables)
9 Months Ended
Sep. 30, 2022
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 
September 30, 2022                    
US Treasury securities  $60,502   $   $(4,779)  $55,723 
Government Sponsored Enterprises   2,500        (404)   2,096 
Mortgage-backed securities   269,609    13    (19,514)   250,109 
Small Business Administration pools   22,950    56    (727)   22,279 
State and local government                 
Corporate and other securities   8,773        (632)   8,143 
Total  $364,334   $69   $(26,056)  $338,350 
                     
       Gross   Gross     
   Amortized   Unrealized   Unrealized     
(Dollars in thousands)  Cost   Gains   Losses   Fair Value 
December 31, 2021                    
US Treasury securities  $15,736   $   $300   $15,436 
Government Sponsored Enterprises   2,499    2        2,501 
Mortgage-backed securities   398,125    3,596    3,992    397,729 
Small Business Administration pools   30,835    505    67    31,273 
State and local government   105,469    4,918    539    109,848 
Corporate and other securities   8,024    157    129    8,052 
Total  $560,688   $9,178   $5,027   $564,839 
Schedule of Held to Maturity

HELD-TO-MATURITY:

 

Investment Securities (Details 2)
       Gross   Gross     
   Amortized   Unrealized   Unrealized     
(Dollars in thousands)  Cost   Gains   Losses   Fair Value 
September 30, 2022                    
US Treasury securities  $   $   $   $ 
Government Sponsored Enterprises                
Mortgage-backed securities   126,365        (8,663)   117,702 
Small Business Administration pools                
State and local government   106,936        (7,691)   99,245 
Corporate and other securities                
Total  $233,301   $   $(16,354)  $216,947 
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 September 30, 2022 and December 31, 2021.

Investment Securities (Details 3)
                         
(Dollars in thousands)  Less than 12 months   12 months or more   Total 
September 30, 2022  Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
Available-for-sale securities:  Value   Loss   Value   Loss   Value   Loss 
                         
US Treasury Securities  $42,805   $1,940   $12,919   $2,839   $55,724   $4,779 
Government Sponsored Enterprise   2,096    404            2,096    404 
Mortgage-backed securities   104,236    6,523    144,072    12,992    248,308    19,515 
Small Business Administration pools   16,139    649    3,053    77    19,192    726 
State and local government                        
Corporate and other securities   2,189    93    3,211    539    5,400    632 
Total  $167,465   $9,609   $163,255   $16,447   $330,720   $26,056 
                               
(Dollars in thousands)  Less than 12 months   12 months or more   Total 
December 31, 2021  Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
Available-for-sale securities:  Value   Loss   Value   Loss   Value   Loss 
                         
US Treasury Securities  $14,479   $264   $958   $36   $15,437   $300 
Mortgage-backed securities   200,238    3,156    48,570    836    248,808    3,992 
Small Business Administration pools   7,232    67            7,232    67 
State and local government   21,261    539            21,261    539 
Corporate and other securities   3,621    129            3,621    129 
Total  $246,831   $4,155   $49,528   $872   $296,359   $5,027 
Schedule of gross unrealized losses and fair values, aggregated by investment category and length of time that individual held to maturity have been in a continuous loss position

Investment Securities (Details 4)
(Dollars in thousands)  Less than 12 months   12 months or more   Total 
September 30, 2022  Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
Held-to-maturity securities:  Value   Loss   Value   Loss   Value   Loss 
                         
US Treasury Securities  $   $   $   $   $   $ 
Government Sponsored Enterprise                        
Mortgage-backed securities   107,682    7,719    10,019    944    117,701    8,663 
Small Business Administration pools                        
State and local government   95,701    7,200    3,544    491    99,245    7,691 
Corporate and other securities                        
Total  $203,383   $14,919   $13,563   $1,435   $216,946   $16,354 
Schedule of Amortized Cost and Fair Value of Investment Securities

The following sets forth the amortized cost and fair value of investment securities at September 30, 2022 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 5)
   Available-for-sale 
September 30, 2022  Amortized   Fair 
(Dollars in thousands)  Cost   Value 
Due in one year or less  $3,846   $3,838 
Due after one year through five years   165,838    157,528 
Due after five years through ten years   170,365    155,694 
Due after ten years   24,285    21,290 
Total  $364,334   $338,350 
           
   Held-to-maturity 
September 30, 2022  Amortized   Fair 
(Dollars in thousands)  Cost   Value 
Due in one year or less  $8,683   $8,617 
Due after one year through five years   48,765    46,457 
Due after five years through ten years   137,408    127,399 
Due after ten years   38,445    34,474 
Total  $233,301   $216,947