Employee Benefit Plans - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 program
Defined Benefit Plan Disclosure [Line Items]
Duration of defined benefit obligation	21 years	21 years 2 months 12 days
Actual return on plan assets	$ 0.1	$ 0.1
Change in discount rate or future pension increase, impact projected benefit obligation, percent	0.50%
Expected future employer contributions next fiscal year	$ 1.3
Statutory pension insurance	$ 13.9	$ 12.8	$ 12.8
Germany | Geographic Concentration Risk | Projected Benefit Pension Obligation
Defined Benefit Plan Disclosure [Line Items]
Concentration risk percentage	91.80%	90.10%
France
Defined Benefit Plan Disclosure [Line Items]
Number of programs ceased, due to plant closure | program				1