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Property, Plant and Equipment
 6 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment consists of the following:
(In thousands)
 
June 30
2019
 
December 31
2018
Land
 
$
30,427

 
$
10,143

Land improvements
 
18,713

 
15,961

Buildings and improvements
 
180,640

 
163,037

Machinery and equipment
 
1,558,713

 
1,470,620

Uncompleted construction
 
61,750

 
36,968

Gross property, plant and equipment
 
1,850,243

 
1,696,729

Less: Accumulated depreciation
 
(1,299,572
)
 
(1,263,936
)
Property, plant and equipment, net
 
$
550,671

 
$
432,793