Financial Instruments (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt	$ 490,585	$ 439,000
Less: Current maturities of long-term debt	27,246	0
Long-term debt	463,339	439,000
Line of Credit
Debt Instrument [Line Items]
Long-term debt	$ 461,000	$ 439,000
Interest rate, effective percentage	3.60%	3.16%
Foreign Bank Debt
Debt Instrument [Line Items]
Long-term debt	$ 29,585	$ 0