XML 54 R24.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Other Investments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Investments, All Other Investments [Abstract] |
Schedule Of Summary Of Investments |
|  | December 31, 2016 |  | December 31, 2015 |
Fair value at beginning of period |  | $ | 1,798 |  | $ | 6,163 |
Sale of Midas Gold Shares, net of costs to sell |  |  | — |  |  | (2,772) |
Gain/(loss) during the period |  |  | 3,196 |  |  | (1,593) |
Fair value at end of period |  | $ | 4,994 |  | $ | 1,798 |
Midas Gold Shares held at the end of the period |  |  | 7,802,615 |  |  | 7,802,615 |

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsAllOtherInvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A tabular disclosure of (a) the aggregate carrying amount of all cost-method investments; (b) the aggregate carrying amount of cost-method investments that the investor did not evaluate for impairment for cost-method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 + Details
Name: | us-gaap_ScheduleOfCostMethodInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration