Employee Benefit Plans - Disaggregated Plan Information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Non-US
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 62,485	$ 54,898	$ 61,952
Accumulated benefit obligation	62,485	54,898
Fair value of plan assets	76,429	68,597	77,141
US plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	240,249	210,944	235,175
Accumulated benefit obligation	240,249	210,944
Fair value of plan assets	$ 194,160	$ 165,730	$ 189,240