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Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax	$ 0	$ 0	$ (245)
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			5,261
Cost of products sold			4,819
Selling, general and administrative			937
Restructuring and other charges			0
Currency exchange losses, net			18
Other income, net			596
Income from discontinued operations before income taxes			83
Provision for income taxes			328
Loss from discontinued operations, net of tax			$ (245)

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