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Note 16 - Incentive Plans (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
  

Three Months Ended March 31,

 
  

2024

  

2023

 

Restricted stock outstanding as of January 1,

  

2,746,116

   

2,605,970

 

Granted (1)

  

872,150

   

893,320

 

Vested

  

(679,546

)

  

(705,374

)

Forfeited

  

(15,562

)

  

(2,168

)

Restricted stock outstanding as of March 31,

  

2,923,158

   

2,791,748

 
Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block]
 

Three Months Ended March 31,

 

2024

 

2023

Performance share awards outstanding as of January 1,

989,860

 

1,004,040

Granted (1)

377,690

 

531,200

Vested (2)

(458,660)

 

(545,380)

Performance share awards outstanding as of March 31,

908,890

 

989,860

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
  

Three Months Ended March 31, 2024

 

Expected volatility

  28.9% 

Dividend yield

  - 

Risk-free interest rate

  4.4%