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Inventories
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories at the dates indicated consisted of the following: 
 
At March 31,
 
At December 31,
(in thousands)
2017
 
2016
 
2016
Raw materials
$
90,545

 
$
82,056

 
$
86,524

In-process products
26,010

 
20,827

 
20,902

Finished products
139,716

 
107,904

 
124,848

 
$
256,271

 
$
210,787

 
$
232,274