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Business Segments
 12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Business Segments
Business Segments

NACCO is a holding company that operates primarily in the mining industry. The Company’s wholly owned subsidiary, NACoal, is the reportable operating segment. See Note 1 for a discussion of the Company's industries and product lines. NACCO's non-operating segment, NACCO and Other, includes the accounts of the parent company and Bellaire.
Financial information for each of NACCO's reportable segments is presented in the following table. All current operations reside in the U.S. The accounting policies of the reportable segments are described in Note 2.
The majority of NACoal's revenues are generated from its consolidated mining operations and value-added mining services. MLMC's customer, Choctaw Generation Limited Partnership, LLLP, accounted for approximately 60% of NACoal's revenues for both of the years ended December 31, 2018 and 2017. NAM's largest customer, Cemex Construction Materials of Florida, LLC, accounted for approximately 20% and 18% of NACoal's revenues for the years ended December 31, 2018 and 2017, respectively. The loss of or significant reduction in sales to any key customer could result in significant decreases in NACoal's revenue and profitability.
The management fees charged to NACoal represent an allocation of corporate overhead of the parent company. The Company believes the allocation method is reasonable. Prior to the spin-off of HBBHC, NACCO received management fees from HBBHC of $3.0 million for the year ended December 31, 2017. In connection with the spin-off of HBBHC, the Company and HBBHC entered into a TSA. See Note 3 for further discussion of the spin-off and TSA.
 
2018
 
2017
 
 
 
 
Revenues from external customers
$
135,375

 
$
104,778

Gross profit (loss)
 
 
 
NACoal
$
30,337

 
$
17,198

NACCO and Other
(369
)
 
(279
)
Total
$
29,968

 
$
16,919

Earnings of unconsolidated operations
$
64,994

 
$
61,361

Selling, general and administrative expenses, including Amortization of intangible assets
 
 
 
NACoal
$
45,939

 
$
42,516

NACCO and Other
6,291

 
7,098

Total
$
52,230

 
$
49,614

Operating profit (loss)
 
 
 
NACoal
$
50,284

 
$
39,677

NACCO and Other
(6,660
)
 
(6,863
)
Total
$
43,624

 
$
32,814

Total assets
 
 
 
NACoal
$
274,800

 
$
277,538

NACCO and Other
120,954

 
135,434

Eliminations
(18,763
)
 
(23,420
)
Total
$
376,991

 
$
389,552

Depreciation, depletion and amortization
 
 
 
NACoal
$
14,596

 
$
12,444

NACCO and Other
87

 
323

Total
$
14,683

 
$
12,767

Capital expenditures
 
 
 
NACoal
$
20,799

 
$
15,692

NACCO and Other
131

 
12

Total
$
20,930

 
$
15,704