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INVENTORIES: (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Metals at lower of average cost or market: |  |  |
Finished goods | $ 103,400,000 |  | $ 84,200,000
Work-in-process | 339,300,000 |  | 305,400,000
Supplies at average cost | 307,200,000 |  | 304,300,000
Total current inventory | 749,940,000 |  | 693,942,000
Inventory, long-term: |  |  |
Leach stockpiles | 441,240,000 |  | 395,177,000
Leaching costs capitalized as long-term inventory of leachable material | 86,100,000 | 68,200,000 |
Leachable material inventories recognized in cost of sales | $ 39,200,000 | $ 26,700,000 |

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- Definition Represents the costs recognized under cost of sales of ore stockpile material contained on a leach pad, such as copper or gold ore. + References No definition available. + Details
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- Definition Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section BB Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.BB) -URI http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Article 5 + Details
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