Employee Benefit Plans - Benefit Obligations of Defined Benefit Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year			$ 3,571	$ 2,747
Service cost	$ 32	$ 172	63	219
Interest cost	37	34	74	63
Benefit obligation, end of year	$ 3,708	$ 3,029	$ 3,708	$ 3,029