Employee Benefit Plans - Schedule of Benefit Obligation, Fair Value of Plan Assets, and Funded Status of our Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in Benefit Obligation [Roll Forward]
Service cost	$ 257	$ 256
Interest cost	3,035	4,069
Change in Plan Assets [Roll Forward]
Fair value of plan assets - ending	147,861
Pension Plan, Defined Benefit
Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning	158,680	141,104
Service cost	257	255
Interest cost	3,027	4,045
Actuarial loss	12,522	11,214
Benefits paid	(4,769)	(4,158)
Currency changes	5,575	6,220
Benefit obligation - ending	175,292	158,680
Change in Plan Assets [Roll Forward]
Fair value of plan assets - beginning	132,621	117,162
Employer contribution	2,822	2,629
Actual return on plan assets	12,535	11,791
Benefits paid	(4,769)	(4,158)
Currency changes	4,652	5,197
Fair value of plan assets - ending	147,861	132,621
Underfunded status	$ (27,431)	$ (26,059)