Employee Benefit Plans - Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Summary of employee benefits charged to operating expenses
Payroll taxes	$ 467	$ 441
Medical plans	468	475
401(k) match and profit sharing	290	369
Periodic pension cost	283	437
Other	11	8
Total employee benefits	$ 1,519	$ 1,730