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Property, Plant and Equipment (Notes)
6 Months Ended
Sep. 30, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment

Property, plant and equipment consists of the following (amounts in thousands):
 
September 30, 2015
 
March 31, 2015
Land
$
63,934

 
$
55,624

Building and building improvements
451,594

 
434,403

Machinery and equipment
1,632,407

 
1,576,074

Projects in process
92,091

 
76,315

 
2,240,026

 
2,142,416

Less accumulated depreciation and amortization
1,608,426

 
1,560,844

 
$
631,600

 
$
581,572


 
Depreciation expense attributed to property, plant and equipment was $26.2 million and $50.9 million for the three and six months ended September 30, 2015, respectively, and $24.3 million and $47.6 million for the three and six months ended September 30, 2014, respectively.