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Note 6 - Non-operating Income (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Other Nonoperating Income, by Component [Table Text Block]
  

Three Months Ended

September 30

  

Nine Months Ended

September 30

 
  

2022

  

2021

  

2022

  

2021

 

Dividends and net realized gains and losses on sales of securities

 $1,324  $2,365  $4,381  $6,242 

Interest income

  1,373   1,020   3,572   3,683 

Equity in earnings of unconsolidated investments

  34   14   498   5,320 

Total non-operating income

 $2,731  $3,399  $8,451  $15,245