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Inventories (Tables)
 3 Months Ended
Sep. 30, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following: 
(in thousands)
September 30, 2016
 
June 30, 2016
Finished goods
$
290,530

 
$
284,054

Work in process and powder blends
153,944

 
166,274

Raw materials
72,623

 
68,472

Inventories at current cost
517,097

 
518,800

Less: LIFO valuation
(57,801
)
 
(59,970
)
Total inventories
$
459,296

 
$
458,830