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Inventories
3 Months Ended
Mar. 31, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories

The Corporation values its inventory at the lower of cost or market with approximately 67% valued by the last-in, first-out ("LIFO") costing method.

 
(In thousands)
 
March 31, 2012
 
December 31, 2011
 
 
Finished products
 
$
63,973

 
$
65,136

Materials and work in process
 
61,837

 
62,638

LIFO allowance
 
(25,901
)
 
(25,901
)
 
 
$
99,909

 
$
101,873