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Inventories
 3 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consist of the following (in thousands):
 
June 30,
2018
 
March 31,
2018
Raw materials
$
38,331

 
$
36,124

Work in process
13,240

 
13,670

Finished goods and other
58,866

 
59,358

 
$
110,437

 
$
109,152