Employee Benefit Plans - Summary of Net Periodic Benefits Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of net periodic benefit cost:
Service cost	$ 1,835	$ 666	$ 157
Interest cost	210	197	183
Expected return on Pension Plan assets	(454)	(364)	(367)
Amortization of net loss	66	46	64
Net periodic benefit cost	$ 1,657	$ 545	$ 37