Discontinued Operations - Assets and Liabilities (Details) - Discontinued Operations, Held-for-sale or Disposed of by Sale - South African Distribution Business and Zambian Operations - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Trade receivables, less allowance for doubtful accounts	$ 0	$ 4,832
Inventories	0	8,499
Net property	0	449
Other assets	0	791
Total assets	0	14,571
Accounts payable	0	2,745
Accrued and other liabilities	0	748
Total liabilities	0	3,493
Net assets	$ 0	$ 11,078