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Acquisitions (Details) (USD $) | 0 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 27, 2014 | Apr. 16, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Business Acquisition [Line Items] |  |  |  |  |  |
Shares Issued for Acquisition |  | 11,572,918 |  |  |  |
Share Price for Acquisition |  | $ 14,980 |  |  |  |
Business Acquisition, Effective Date of Acquisition | May 27, 2014 | Apr. 16, 2013 |  |  |  |
Payments to Acquire Royalty Interests in Mining Properties | $ 2,200,000 |  | $ 12,345,000 | $ 15,480,000 | $ 27,028,000 | $ 30,929,000
La Preciosa Net Smelter Royalty | 1.25% |  |  |  |  |
Payments for Royalties | 1,800,000 |  |  |  |  |
Business Acquisition, Date of Acquisition Agreement | Sep. 02, 2014 |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  | 3,487,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets |  | 635,000 |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned |  | 173,363,000 |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Fair Value Method |  | 99059 |  |  |  |
Business Combination, Consideration Transferred, Other |  | 5,777,000 |  |  |  |
Business Combination, Consideration Transferred, Fees and Expenses Paid |  | 17,642,000 |  |  |  |
Business Combination, Consideration Transferred |  | 295,841,000 |  |  |  |
Business Combination, Consideration Transferred, Liabilities Assumed, Current |  | 2,616,000 |  |  |  |
Business Combination, Consideration Transferred, Deferred Income Taxes Assumed |  | 114,339,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | 116,955,000 |  |  |  |
Business Combination, Consideration Transferred, Cost of Acquired Entity |  | 412,796,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Mineral Interests |  | 408,352,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets |  | 322,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  | $ 412,796,000 |  |  |  |
Warrants Issued for Acquisition |  | 1,588,768 |  |  |  |
Warrant Price for Acquisition |  | $ 3,640 |  |  |  |

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- Definition The amount of cash paid for royalties during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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