Employee Benefit Plans - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Summary of employee benefits charged to operating expenses
Payroll taxes	$ 338	$ 310	$ 1,123	$ 1,102
Medical plans	426	436	1,368	1,405
401(k) match and profit sharing	411	513	1,206	1,456
Periodic pension cost	402	449	1,206	1,347
Other	20	3	32	10
Total employee benefits	$ 1,597	$ 1,711	$ 4,936	$ 5,320