Employee Benefit Plans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 0	$ 0
Service cost	0	0
Non-US
Defined Benefit Plan Disclosure [Line Items]
Interest cost	433,000	445,000
Return on plan assets	(499,000)	(634,000)
Recognized net actuarial loss	3,000	3,000
Net pension benefit cost (gain)	(63,000)	(186,000)
US
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1,892,000	2,178,000
Return on plan assets	(2,919,000)	(2,578,000)
Recognized net actuarial loss	716,000	692,000
Net pension benefit cost (gain)	$ (311,000)	$ 292,000