Accrued Liabilities (Schedule of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Salaries, wages and benefits	$ 72,373	$ 57,867
Contract liabilities	7,127	15,176
Returns and allowances	10,232	9,084
Dividends	8,111	7,778
Pension and postretirement	9,356	6,683
Operating and finance lease liabilities	7,335	5,929
Other tax	10,171	10,274
Contract loss reserve	2,721	2,359
Freight	1,979	1,966
Professional fees	3,912	3,439
Other	9,671	5,830
Total accrued liabilities	$ 142,988	$ 126,385