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Inventories
3 Months Ended
Mar. 31, 2013
Notes to Financial Statements [Abstract]  
Inventories
5.
Inventories

 
 
March 31,
2013
 
December 31,
2012
 
 
 
(in thousands)
 
Raw materials and supplies
 
$
125,415
 
$
121,573
 
Work in process
 
 
31,265
 
 
29,725
 
Finished products
 
 
85,929
 
 
81,536
 
Inventory reserves
 
 
(42,586
)
 
(41,967
)
 
 
$
200,023
 
$
190,867