Discontinued Operations - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 0	$ 1,300	$ 0	$ (55)
Discontinued Operations, Held-for-sale or Disposed of by Sale | South African Distribution Business and Zambian Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0	0	0	5,261
Other (income) loss, net	0	1,300	0
Disposal Group, Including Discontinued Operation, Other Income				(896)
Cost of products sold	0	0	0	4,819
Selling, general and administrative	0	0	0	937
Currency exchange losses, net	0	0	0	18
Income from discontinued operations before income taxes	0	(1,300)	0	383
Provision for income taxes	0	0	0	328
Income from discontinued operations, net of tax	$ 0	$ (1,300)	$ 0	$ 55