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Inventories (Tables)
 9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Schedule Of Inventories
Inventories, valued at the lower of cost (first-in, first-out (FIFO) method) or market, consisted of the following at:
 
September 30,
 
December 31,
(In thousands)
2018
 
2017
 
2017
Raw materials
$
283,267

 
$
191,680

 
$
233,187

Work in process
12,659

 
10,562

 
10,408

Finished goods
29,893

 
27,521

 
31,153

Inventories, net
$
325,819

 
$
229,763

 
$
274,748