Employee Benefit Plans - Benefit Obligations of Defined Benefit Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year			$ 3,571	$ 2,747
Service cost	$ 32	$ 235	95	454
Interest cost	37	36	111	99
Benefit obligation, end of year	$ 3,777	$ 3,300	$ 3,777	$ 3,300