Retirement Plans - Reconciliation of Changes in Plan's Projected Benefit Obligations and Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in plan assets:
Company contributions	$ 100
Pension Plans, Defined Benefit [Member]
Change in benefit obligation:
Projected benefit obligation at beginning of year	6,749	$ 6,339
Interest cost	151	191	$ 242
Actuarial (gain) loss	(258)	567
Benefits paid	(344)	(348)
Projected benefit obligation at end of year	6,298	6,749	6,339
Change in plan assets:
Fair value of plan assets at beginning of year	5,808	5,383
Actual return on plan assets	294	623
Company contributions	119	150
Benefits paid	(344)	(348)
Fair value of plan assets at end of year	5,877	5,808	$ 5,383
Funded status	$ (421)	$ (941)