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Discontinued Operations - Net Loss (Income) Related to Noncontrolling Interest (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net loss $ 2,863 $ 579 $ 198
South African Distribution Business and Zambian Operations | Discontinued Operations, Held-for-sale or Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Loss from continuing operations 2,971 1,296 870
Loss (income) from discontinued operations (108) (717) (672)
Net loss $ 2,863 $ 579 $ 198