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Income Taxes (Periods Subject To Examination Of Tax Returns) (Details) | 12 Months Ended
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Dec. 31, 2015
South Africa [Member] |
Period | 2009
Minimum [Member] | U.S. Federal [Member] |
Period | 2007
Minimum [Member] | U.S. State - Colorado [Member] |
Period | 2005
Minimum [Member] | Canada [Member] |
Period | 2011
Minimum [Member] | Poland [Member] |
Period | 2013
Minimum [Member] | Austria [Member] |
Period | 2010
Maximum [Member] | U.S. Federal [Member] |
Period | 2014
Maximum [Member] | U.S. State - Colorado [Member] |
Period | 2014
Maximum [Member] | Canada [Member] |
Period | 2014
Maximum [Member] | Poland [Member] |
Period | 2014
Maximum [Member] | Austria [Member] |
Period | 2014

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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