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Note 8 - Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended

  

Six Months Ended

 

(In thousands)

 

June 30, 2021

  

June 30, 2020

  

June 30, 2021

  

June 30, 2020

 

Pension Benefits:

                

Service cost

 $  $(26) $  $14 

Interest cost

  543   2,273   1,086   2,498 

Expected return on plan assets

  (544)  (2,058)  (1,087)  (2,094)

Administrative expenses

     (11)     12 

Settlement loss

     323      831 

Amortization of net actuarial losses

  37   35   73   (9)

Net periodic pension cost

 $36  $536  $72  $1,252