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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment, Net [Abstract]  
Property, Plant And Equipment Property, Plant and Equipment
Property, plant and equipment consist of the following:
 
 
December 31,
 
 
2019
 
2018
Building and improvements
 
$
17,426

 
$
17,426

Plant and equipment
 
1,825,332

 
1,804,684

Other
 
97,402

 
88,077

 
 
1,940,160

 
1,910,187

Less: Accumulated depreciation
 
(882,768
)
 
(795,167
)
 
 
1,057,392

 
1,115,020

Construction in progress
 
45,603

 
33,245

Property, plant and equipment, net
 
$
1,102,995

 
$
1,148,265


Depreciation expense on property, plant and equipment of $89,454, $88,197 and $91,154 is included in cost of sales in the consolidated statements of operations for the years ended December 31, 2019, 2018 and 2017, respectively.