Financial Instruments (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt	$ 439,134	$ 456,885
Less: Current maturities of long-term debt	4,445	4,218
Long-term debt	434,689	452,667
Line of Credit
Debt Instrument [Line Items]
Long-term debt	$ 429,000	$ 446,000
Interest rate, effective percentage	3.34%	3.49%
Foreign bank debt
Debt Instrument [Line Items]
Long-term debt	$ 10,134	$ 10,885