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Inventories
12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories 
 
December 31,
(In thousands)
2013
 
2012
Finished products
$
74,466

 
$
72,658

Work in process
8,108

 
13,473

Raw materials and supplies
54,263

 
50,169

Total inventories
136,837

 
136,300

Excess of FIFO costs over LIFO costs
44,670

 
46,519

Total FIFO inventories
181,507

 
182,819


Inventories stated on the LIFO basis represent 15% and 16% of total inventories at December 31, 2013 and 2012, respectively.
Reductions in certain inventory quantities during the years ended December 31, 2013 and 2012 resulted in liquidations of LIFO inventories carried at lower costs prevailing in prior years. The effect of LIFO liquidations during 2013 reduced cost of sales by $2.1 million and increased net income by $1.4 million. The effect of LIFO liquidations during 2012 reduced cost of sales by $0.8 million and increased net income by $0.5 million.