Discontinued Operations - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 2,484	$ 470	$ 1,355	$ 778
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	11,384	5,261	22,541
Other income, net	2,484	107	2,196	173
Cost of products sold	0	9,058	4,819	18,048
Selling, general and administrative	0	1,682	937	3,284
Currency exchange losses, net	0	38	18	208
Income from discontinued operations before income taxes	2,484	713	1,683	1,174
Provision for income taxes	0	243	328	396
Income from discontinued operations, net of tax	$ 2,484	$ 470	$ 1,355	$ 778