Employee Benefit Plans - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Summary of employee benefits charged to operating expenses
Payroll taxes	$ 387	$ 344	$ 854	$ 786
Medical plans	427	467	895	941
401(k) match and profit sharing	221	426	511	796
Periodic pension cost	247	367	531	804
Other	8	4	19	12
Total employee benefits	$ 1,290	$ 1,608	$ 2,810	$ 3,339