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Property, Plant and Equipment, Net
3 Months Ended
Mar. 31, 2016
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net
 
Property, plant and equipment, net, consisted of the following: 
 
At March 31,
 
At December 31,
(in thousands)
2016
 
2015
 
2015
Land
$
30,535

 
$
28,795

 
$
28,698

Buildings and site improvements
173,605

 
171,541

 
171,890

Leasehold improvements
5,616

 
5,428

 
5,560

Machinery, equipment, and software
239,264

 
225,820

 
232,560

 
449,020

 
431,584

 
438,708

Less accumulated depreciation and amortization
(264,398
)
 
(246,055
)
 
(257,115
)
 
184,622

 
185,529

 
181,593

Capital projects in progress
32,038

 
19,480

 
32,123

 
$
216,660

 
$
205,009

 
$
213,716