Retirement Plans - Change in Benefit Obligations and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension plan
Change in benefit obligation - Pension
Benefit obligation at beginning of year	$ 12,037	$ 10,710
Interest cost	291	338	$ 389
Actuarial (gain)/loss assumption changes	(722)	1,248
Benefits paid	(296)	(259)
Benefit obligation and accumulated benefit obligation at end of year	11,310	12,037	10,710
Change in Plan Assets
Fair value of plan assets at beginning of year	10,435	8,920
Actual return on plan assets	821	1,609
Employer contribution	165	165
Benefits/expenses paid	(296)	(259)
Fair value of plan assets at end of year	11,125	10,435	8,920
Funded status - liability	(185)	(1,602)
Amounts recorded in stockholders’ equity
Net actuarial loss	2,376	3,242
Total amount recorded	2,376	3,242
Amount recorded, net taxes	1,711	2,335
SERP liability adjustments
Change in benefit obligation - Pension
Benefit obligation at beginning of year	8,419	8,011
Interest cost	163	229	303
Actuarial (gain)/loss assumption changes	(206)	708
Benefits paid	(529)	(529)
Benefit obligation and accumulated benefit obligation at end of year	7,847	8,419	$ 8,011
Change in Plan Assets
Funded status - liability	(7,847)	(8,419)
Amounts recorded in stockholders’ equity
Net actuarial loss	2,693	3,024
Total amount recorded	2,693	3,024
Amount recorded, net taxes	$ 1,939	$ 2,178