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Discontinued Operations - Net Loss (Income) Related to Noncontrolling Interest (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net (income) loss $ (1,926) $ 2,863 $ 579
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]      
(Income) loss from continuing operations (1,416) 2,971 1,296
(Income) loss from discontinued operations (510) (108) (717)
Net (income) loss $ (1,926) $ 2,863 $ 579