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Note 14 - Other Comprehensive Income (Loss) (Tables)
 3 Months Ended
Mar. 31, 2025
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
      

Reclassification

         
  

Net unrealized

  

adjustment for

         
  

holding (losses)

  

(gains) losses

         
  

gains on available

  

realized in income

  

Change in funded status

     

(In Thousands of Dollars)

 

for sale securities

  

on fair value hedge

  

of post-retirement plan

  

Total

 

Balance December 31, 2024

 $(192,860) $(403) $(2) $(193,265)

Other comprehensive (loss) before reclassification

  15,096   0   0   15,096 

Amounts reclassified from accumulated other comprehensive income

  1,054   (186)  0   868 

Net current period other comprehensive (loss) income

  16,150   (186)  0   15,964 

Balance March 31, 2025

 $(176,710) $(589) $(2) $(177,301)
                 

Balance December 31, 2023

 $(171,539) $(1,013) $(2) $(172,554)

Other comprehensive income before reclassification

  (15,149)  0   0   (15,149)

Amounts reclassified from accumulated other comprehensive (loss)

  1,686   1,063   0   2,749 

Net current period other comprehensive income

  (13,463)  1,063   0   (12,400)

Balance March 31, 2024

 $(185,002) $50  $(2) $(184,954)