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Property, plant and equipment
12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
Property, plant and equipment
Property, plant and equipment, at December 31, consist of the following:
 
2015
2014
Land and improvements
$
42,654

$
43,385

Buildings and improvements
325,580

345,271

Machinery and equipment
1,349,731

1,476,518

Construction in progress
173,418

182,393

 
1,891,383

2,047,567

Less accumulated depreciation
(659,127
)
(742,024
)
Property, plant and equipment - net
$
1,232,256

$
1,305,543


For the years ended December 31, 2015, 2014 and 2013, we recorded depreciation expense of $80,117, $70,827 and $66,570, respectively.