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Business Segments (Tables)
 3 Months Ended
Mar. 31, 2018
Segment Reporting [Abstract]  
Segment Reporting Information
Financial information for each of NACCO's reportable segments is presented in the following table:
 
THREE MONTHS ENDED
 
MARCH 31
 
2018
 
2017
Revenues
 
 
 
NACoal
$
31,200

 
$
28,300

Total
$
31,200

 
$
28,300

 
 
 
 
Operating profit (loss)
 

 
 

NACoal
$
11,282

 
$
11,326

NACCO and Other 
(1,561
)
 
(1,520
)
Total
$
9,721

 
$
9,806