Employee Benefit Plans - Change in Plan Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at January 1, 2019	$ 7,420
Actual return	150
Employer contribution	0
Benefits paid	(130)
Effect of exchange rate changes	67
Plan assets at March 31, 2019	$ 7,507