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Discontinued Operations Related to Net Loss (Income) Related to Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss (income)	$ 453	$ (7)	$ 685	$ 102
Zambian Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from continuing operations	347	90
Loss (income) from discontinued operations	106	(97)
Net loss (income)	$ 453	$ (7)
Discontinued Operations, Held-for-sale or Disposed of by Sale | Zambian Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from continuing operations			521	309
Loss (income) from discontinued operations			164	(207)
Net loss (income)			$ 685	$ 102

X

- Definition

Amount of income (loss) from continuing operations attributable to the noncontrolling interest. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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