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Discontinued Operations - Discontinued Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
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 sales $ 8,854 $ 11,648 $ 11,384 $ 11,157 $ 12,222 $ 14,645 $ 10,589 $ 10,060 $ 43,043 $ 47,516  
Income from discontinued operations, net of tax                 1,325 1,776 $ 3,061
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]                      
Net sales                 43,043 47,516 52,692
Other income, net                 580 660 40
Cost of products sold                 34,764 38,259 41,181
Selling, general and administrative                 6,680 7,650 7,389
Restructuring and other charges                 14   0
Currency exchange losses (gains), net                 266 (116) (325)
Income from discontinued operations before income taxes                 1,899 2,383 4,487
Provision for income taxes                 574 607 1,426
Income from discontinued operations, net of tax                 $ 1,325 $ 1,776 $ 3,061