Long-Term Debt And Lines Of Credit (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2026	Apr. 10, 2026
Debt Instrument [Line Items]
Long-term debt	$ 236,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Unused lines of credit	166,700
Credit Agreement [Member]
Debt Instrument [Line Items]
Standby letters of credit	$ 47,300
Credit Agreement [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity		$ 100,000
Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility period, years	5 years
Borrowing capacity		$ 450,000
Basis spread on variable interest rate	1.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Credit Agreement [Member] \| Expansion Feature [Member]
Debt Instrument [Line Items]
Borrowing capacity	$ 250,000

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Indicates type of variable interest rate on debt instrument.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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