Employee Benefit Plans - Unfunded Post Retirement Benefits Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 1,829	$ 2,030
Interest cost	28	51	$ 89
Service cost	52	61	74
Actual claims	(31)	(36)
Actuarial gain	(391)	(277)
Benefit obligation at end of year	$ 1,487	$ 1,829	$ 2,030