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Inventories, Net
 6 Months Ended
Jun. 30, 2017
Inventories, Net  
Inventories, Net

7.    Inventories, Net

 

Inventories are valued principally at the lower of cost, determined using the average cost method, or market.  Costs for raw materials and finished goods include materials, labor, and production overhead.  Inventories, net consisted of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

 

June 30,

 

December 31,

 

 

 

2017

 

2016

 

Lime and limestone inventories:

    

 

    

    

 

    

 

Raw materials

 

$

4,097

 

$

4,811

 

Finished goods

 

 

1,571

 

 

2,070

 

 

 

$

5,668

 

$

6,881

 

Service parts inventories

 

 

5,678

 

 

5,552

 

 

 

$

11,346

 

$

12,433