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Note 11 - Deferred Compensation Plan (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation [Table Text Block]
  

March 31,

  

December 31,

 
  

2021

  

2020

 

Deferred compensation plan asset components:

        

Cash surrender value of corporate-owned life insurance policies

 $19,886  $19,222 

Fair value of mutual funds and money market funds

  28,252   26,924 

Total

 $48,138  $46,146 
         

Deferred compensation plan assets reported in:

        

Other long-term assets

 $48,138  $46,146 
         

Deferred compensation plan liabilities reported in:

        

Accrued compensation and related benefits (short-term)

 $396  $155 

Other long-term liabilities

  49,837   48,280 

Total

 $50,233  $48,435