Note 3 - Financing Arrangements (Details Textual) $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($)
Long-Term Debt, Maturity, Year One	$ 699.9
Long-Term Debt, Maturity, Year Four	766.9
Committed Term Loans [Member]
Debt Instrument, Loans, Maximum Borrowing Capacity	700.0
Senior Notes Issued in March 2019 [Member] \| Senior Notes [Member]
Unsecured Debt	$ 700.0
Debt Instrument, Interest Rate, Stated Percentage	3.875%
Senior Notes Issued in March 2025 [Member] \| Senior Notes [Member]
Unsecured Debt	$ 750.0
Debt Instrument, Interest Rate, Stated Percentage	4.90%
Revolving Credit Facility and Term Loans [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,700.0
Debt, Weighted Average Interest Rate	4.62%
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000.0
Debt Instrument, Term	5 years
Line of Credit Facility, Maximum Borrowing Capacity, Optional Increase	$ 400.0
Line of Credit Facility, Duration By Which Maturity Date May Be Extended Upon Request	1 year
Long-Term Line of Credit	$ 26.8

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Optional increase in the 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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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average interest rate of debt outstanding.

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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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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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