Employee Benefit Plans - Accumulated Post-Retirement Benefit Obligation, Funded Status, and Net Periodic Benefit Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Change in Benefit Obligations [Roll Forward]
Benefit obligation at beginning of year	$ 1,523	$ 1,581	$ 1,599
Interest cost	29	46	66
Benefits paid	(93)	(97)	(97)
Actuarial (gain) loss	(106)	(7)	13
Benefit obligation at end of period	1,353	1,523	1,581
Funded Status of Plan [Abstract]
Benefit obligation at end of period	(1,353)	(1,523)	(1,581)
Unamortized gain	(133)	(35)	(31)
Accrued benefit cost	$ (1,486)	$ (1,558)	$ (1,612)
Weighted average discount rate as of December 31	0.0250	0.0200	0.0300
Components of Net Periodic Benefit Cost [Abstract]
Interest cost	$ 29	$ 46	$ 66
Other settlement income	(9)	(2)	(2)
Net periodic benefit cost	$ 20	$ 44	$ 64
Weighted average discount rate for net periodic cost	2.00%	3.00%	4.25%