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Income Taxes (Schedule of Components of Earnings Before Income Taxes and Income Tax Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]      
Earnings before income taxes, Domestic $ 392.7 $ 342.0 $ 291.9
Earnings before income taxes, Foreign 7.6 5.1 6.4
Earnings before income taxes 400.3 347.1 298.3
Current income tax expense (benefit), U.S. federal 48.3 64.0 59.8
Current income tax expense (benefit), U.S. state and local 16.5 16.3 13.9
Current income tax expense (benefit), Foreign 2.8 1.2 1.7
Current income tax expense (benefit), Total 67.6 81.5 75.4
Deferred income tax expense (benefit), U.S. federal 21.8 (0.9) (3.2)
Deferred income tax expense (benefit), U.S. state and local 2.9 1.7 2.5
Deferred income tax expense (benefit), Foreign (0.7) (0.1) (0.2)
Deferred income tax expense (benefit), Total 24.0 0.7 (0.9)
Total income tax expense, U.S. federal 70.1 63.1 56.6
Total income tax expense, U.S. state and local 19.4 18.0 16.4
Total income tax expense, Foreign 2.1 1.1 1.5
Total income tax expense $ 91.6 $ 82.2 $ 74.5