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Contingent Liabilities (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2017 | Jun. 30, 2016
Contingent Liabilities Details Narrative |  |  |  |  |
Cap on environment financial responsibility | $ 1,871 |  |  | $ 1,871 |
Environmental remediation expense | 0 | $ 2,000 |  | 0 | $ 2,000
Total cost of remediation | $ 1,900 |  |  | $ 1,900 |
Environmental remediation recovery |  |  | $ 3,000 |  |

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- Definition Amount of any recovery from third parties that is credited to environmental remediation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 + Details
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