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Inventories (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Jun. 30, 2019
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Inventories |  |
Finished goods | $ 335,437 | $ 311,684
Work in process and powder blends | 200,915 | 246,414
Raw materials | 84,581 | 95,620
Inventories at current cost | 620,933 | 653,718
Less: LIFO valuation | (63,800) | (82,142)
Total inventories | $ 557,133 | $ 571,576
Inventories (Textual) [Abstract] |  |
Percentage of inventories valued by using LIFO method | 40.00% | 41.00%

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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