Retirement Plans - Other (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) employee	Dec. 31, 2020 USD ($)
Projected benefit obligation:
Balance, beginning of the year	$ 3,089	$ 2,637
Service cost	127	116
Interest cost	58	76
Actuarial (gain) loss	(126)	422
Benefits paid to participants	(41)	(162)
Balance, end of year	3,107	3,089
Funded status of the plan
Excess of benefit obligation over the value of plan assets	(3,107)	(3,089)
Unrecognized net actuarial loss	772	957
Unrecognized prior service cost	13	20
Accrued benefit cost	(2,322)	(2,112)
Net amounts recognized in the consolidated balance sheets
Accrued benefit cost	(3,107)	(3,089)
Accumulated other comprehensive loss	785	977
Accrued benefit cost	(2,322)	$ (2,112)
Benefits expected to be paid in each of the next five years and thereafter
2022	214
2023	182
2024	129
2025	139
2026	135
2027 through 2031	957
Total	$ 1,756
Weighted-average rates used
Discount rate on the benefit obligation (as a percent)	2.46%	2.00%
Rate of employee compensation increase (as a percent)	2.50%
Rate of employee compensation increase through next year (as a percent)	1.75%
Rate of employee compensation increase thereafter (as a percent)	2.50%
Pension expense
Service cost	$ 127	$ 116
Interest cost	58	76
Amortization of prior service cost	7	8
Net loss amortization	58	40
Net periodic benefit cost	$ 250	$ 240
Minimum
Weighted-average rates used
Rate of employee compensation increase (as a percent)		1.75%
Maximum
Weighted-average rates used
Rate of employee compensation increase (as a percent)		2.50%
WAPA
Number of months to be in service for applicability of retirement plan	3 months
Number of weeks per year of service for one-time lump sum payment at retirement	14 days
Maximum number of retirees per year under the plan | employee	5
Number of retirees per year under the retirement plan | employee	154
WAPA | Maximum
Number of weeks per year of service for one-time lump sum payment at retirement	315 days