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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
The following table sets forth the components of inventory:
 
December 31,
(In thousands)
2018
 
2017
Finished products
$
65,965

 
$
66,064

Work in process
6,169

 
10,141

Raw materials and supplies
124,554

 
117,388

Inventories at current cost
196,688

 
193,593

Less: LIFO valuation
(40,086
)
 
(39,854
)
Total inventories
$
156,602

 
$
153,739


Inventories stated on the LIFO basis represent 39% of total inventories at both December 31, 2018 and 2017.
Reductions in certain inventory quantities during the year ended December 31, 2016 resulted in liquidations of LIFO inventories carried at lower costs prevailing in prior years. The effect of LIFO liquidations during 2016 reduced cost of sales by $0.3 million and increased net income by $0.2 million. We did not have any LIFO liquidations during the years ended December 31, 2018 and 2017.