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Property, Plant and Equipment, Net
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net at December 31 was as follows:
 
 
2014
 
2013
 
(Dollars in thousands)
Land
$
53,652

 
$
60,783

Buildings and improvements
320,833

 
328,324

Machinery and equipment
2,386,245

 
2,372,648

Construction in progress
79,291

 
53,382

 
2,840,021

 
2,815,137

Accumulated depreciation
(1,776,390
)
 
(1,696,694
)
 
$
1,063,631

 
$
1,118,443


 
Depreciation expense in 2014, 2013 and 2012 was $134.6 million, $157.3 million and $158.4 million, respectively.