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Long-term Debt (Schedule Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term Debt, Noncurrent	$ 1,172,732	$ 643,622
2.70% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes, interest rate	2.70%	2.70%
Long-term Debt, Noncurrent	$ 394,064	$ 393,622
3.78% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes, interest rate	3.78%	3.78%
Long-term Debt, Noncurrent	$ 250,000	$ 250,000
Unsecured Debt
Debt Instrument [Line Items]
Long-term Debt, Noncurrent	249,668	0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Noncurrent	$ 279,000	$ 0

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Contractual interest rate for funds borrowed, under the debt agreement.

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