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Note 3 - Miscellaneous Other Income (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Interest and Other Income [Table Text Block]
   

For the Three Months Ended June 30,

   

For the Six Months Ended June 30,

 
   

2020

   

2019

   

2020

   

2019

 

Contract Buyout

  $ 30,144     $ 1,342     $ 40,969     $ 2,390  

Royalty Income - Non-Operated Coal

    2,893       5,677       7,397       11,887  

Property Easements and Option Income

    413       450       476       1,429  

Rental Income

    325       681       822       1,298  

Interest Income

    122       757       366       1,644  

Purchased Coal Sales

          2,730             5,916  

Other

    39       557       76       922  

Miscellaneous Other Income

  $ 33,936     $ 12,194     $ 50,106     $ 25,486