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Note 2 - Securities (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]
  

December 31, 2021

 
      

Gross

  

Gross

     

(Dollars in thousands)

 

Amortized

  

Unrealized

  

Unrealized

  

Fair

 
  

Cost

  

Gains

  

Losses

  

Value

 

Equity securities

 $7,953  $665  $(126) $8,492 
  

December 31, 2020

 
      

Gross

  

Gross

     

(Dollars in thousands)

 

Amortized

  

Unrealized

  

Unrealized

  

Fair

 
  

Cost

  

Gains

  

Losses

  

Value

 

Equity securities

 $2,836  $60  $-  $2,896 
Debt Securities, Available-for-sale [Table Text Block]
  

December 31, 2021

 
      

Gross

  

Gross

     

(Dollars in thousands)

 

Amortized

  

Unrealized

  

Unrealized

  

Fair

 
  

Cost

  

Gains

  

Losses

  

Value

 

U.S. Government and federal agency

 $2,001  $7  $-  $2,008 

U.S. Treasury notes and bonds

  93,267   23   (1,311)  91,979 

State and municipal

  528,252   10,704   (4,109)  534,847 

Mortgage-backed

  441,383   781   (9,049)  433,115 

Corporate

  20,856   19   (233)  20,642 

Asset-backed securities

  16,387   -   (93)  16,294 

Total

 $1,102,146  $11,534  $(14,795) $1,098,885 
  

December 31, 2020

 
      

Gross

  

Gross

     

(Dollars in thousands)

 

Amortized

  

Unrealized

  

Unrealized

  

Fair

 
  

Cost

  

Gains

  

Losses

  

Value

 

U.S. Government and federal agency

 $2,007  $44  $-  $2,051 

U.S. Treasury notes and bonds

  1,996   60   -   2,056 

State and municipal

  307,201   13,191   (24)  320,368 

Mortgage-backed

  246,085   1,510   (872)  246,723 

Corporate

  3,539   51   (1)  3,589 

Total

 $560,828  $14,856  $(897) $574,787 
Schedule of Realized Gain (Loss) [Table Text Block]

(Dollars in thousands)

            
  

2021

  

2020

  

2019

 

Proceeds from sales of securities

 $29,742  $121,942  $178,913 

Gross realized gains

  0   1,308   22 

Gross realized losses

  (40)  -   - 
Investments Classified by Contractual Maturity Date [Table Text Block]

(Dollars in thousands)

 

Amortized

  

Fair

 
  

Cost

  

Value

 

Due within one year

 $25,111  $25,310 

Due after one year through five years

  49,146   50,979 

Due after five years through ten years

  474,166   480,614 

Due after ten years

  112,340   108,867 

Total debt securities

  660,763   665,770 

Mortgage-backed securities

  441,383   433,115 

Equity securities

  7,953   8,492 

Total

 $1,110,099  $1,107,377 
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

(Dollars in thousands)

 

2021

  

2020

 

Securities pledged for Community Reinvestment Act credits

 $273  $278 
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]
  

2021

 
  

Less than 12 months

  

More than 12 months

  

Total

 

(Dollars in thousands)

 

Fair

  

Unrealized

  

Fair

  

Unrealized

  

Fair

  

Unrealized

 
  

Value

  

Losses

  

Value

  

Losses

  

Value

  

Losses

 

U.S. Government and federal agency

 $-  $-  $-  $-  $-  $- 

U.S. Treasury notes and bonds

  89,958   1,311   -   -   89,958   1,311 

State and municipal

  130,001   3,253   15,237   856   145,238   4,109 

Mortgage-backed

  261,560   5,709   86,974   3,340   348,534   9,049 

Corporate

  17,369   233   -   -   17,369   233 

Asset-backed securities

  16,294   93   -   -   16,294   93 

Total temporarily impaired

 $515,182  $10,599  $102,211  $4,196  $617,393  $14,795 
  

2020

 
  

Less than 12 months

  

More than 12 months

  

Total

 

(Dollars in thousands)

 

Fair

  

Unrealized

  

Fair

  

Unrealized

  

Fair

  

Unrealized

 
  

Value

  

Losses

  

Value

  

Losses

  

Value

  

Losses

 

U.S. Government and federal agency

 $-  $-  $-  $-  $-  $- 

U.S. Treasury notes and bonds

  -   -   -   -   -   - 

State and municipal

  8,950   24   -   -   8,950   24 

Mortgage-backed

  75,126   866   9,994   6   85,120   872 

Corporate

  453   1   -   -   453   1 

Asset-backed securities

  -   -   -   -   -   - 

Total temporarily impaired

 $84,529  $891  $9,994  $6  $94,523  $897 
Gain (Loss) on Securities [Table Text Block]
  

2021

  

2020

  

2019

 
             

Net gains and losses recognized during the period

 $479  $(155) $- 

Less: Net gains and losses recognized during the period on securities sold

  -   -   (5)
             

Unrealized gains and losses recognized during the reporting period on securities still held at the reporting date

 $479  $(155) $5