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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2018
Accounting Policies [Abstract] |
Summary of Contract Liability | The following table presents a rollforward of the Franco-Nevada contract liability balance:
| Three months ended March 31,
In thousands | 2018 |  | 2017
Opening Balance | $ | 14,883 |  |  | $ | 19,281 |
Revenue Recognized | (543 | ) |  | $ | (1,629 | )
Closing Balance | $ | 14,340 |  |  | $ | 17,652 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
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