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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Jun. 30, 2014
Inventories
Finished goods	$ 345,617us-gaap_InventoryFinishedGoods	$ 371,599us-gaap_InventoryFinishedGoods
Work in process and powder blends	269,584us-gaap_InventoryWorkInProcess	308,129us-gaap_InventoryWorkInProcess
Raw materials	116,160us-gaap_InventoryRawMaterialsAndSupplies	126,004us-gaap_InventoryRawMaterialsAndSupplies
Inventories at current cost	731,361us-gaap_InventoryGross	805,732us-gaap_InventoryGross
Less: LIFO valuation	(98,882)us-gaap_InventoryLIFOReserve	(101,966)us-gaap_InventoryLIFOReserve
Total inventories	$ 632,479us-gaap_InventoryNet	$ 703,766us-gaap_InventoryNet
Inventories (Textual) [Abstract]
Percentage of inventories valued by using LIFO method	47.00%us-gaap_PercentageOfLIFOInventory	43.00%us-gaap_PercentageOfLIFOInventory

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5



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-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.6(a)(1))

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

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-Publisher FASB

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

+ References

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The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent.

+ References

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