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Inventories, Net
 3 Months Ended
Mar. 31, 2019
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):

 

 

 

 

 

 

 

 

 

 

 

March 31,

 

December 31,

 

 

 

2019

 

2018

 

Lime and limestone inventories:

    

 

    

    

 

    

 

Raw materials

 

$

4,813

 

$

4,693

 

Finished goods

 

 

1,830

 

 

2,153

 

 

 

 

6,643

 

 

6,846

 

Service parts inventories

 

 

6,178

 

 

6,000

 

 

 

$

12,821

 

$

12,846