Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal tax rate	35.00%	21.00%	35.00%
Increase in valuation allowance	$ 2,400,000	$ 1,800,000
Income Tax Disclosure [Line Items]
Limitation on operating loss carryforward	200,000
Undistributed earnings for foreign operations	59,000,000	34,500,000
Income (loss) from foreign operations	14.4	$ 13.1	$ 0
Credit to income tax provision	(5,100,000.0)
Transition tax	5,300,000
Domestic Tax Authority
Income Tax Disclosure [Line Items]
Net operating loss carryforward from acquisitions	600,000
Tax credit carryforward	300,000
State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Operating loss carryforwards	500,000
IRS | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	900,000
France tax authority | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	8,900,000
Italy tax authority | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	400,000
Chile tax authority | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	1,300,000
Germany Tax Authority [Member] [Domain] | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	800,000
South Africa Tax Authority [Member] [Domain] | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	200,000
National Tax Agency, Japan [Member] | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	300,000
Brazil tax authority | Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 300,000