Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Earnings before income taxes, Domestic	$ 291.9	$ 251.7	$ 239.3
Earnings before income taxes, Foreign	6.4	5.9	3.4
Earnings from continuing operations before income taxes	298.3	257.6	242.7
Current income tax expense (benefit), Federal	59.8	46.3	39.4
Current income tax expense (benefit), Foreign	1.7	1.3	0.6
Current income tax expense (benefit), State	13.9	11.3	8.7
Current income tax expense (benefit), Total	75.4	58.9	48.7
Deferred income tax expense (benefit), Federal	(3.2)	(1.9)	3.6
Deferred income tax expense (benefit), Foreign	(0.2)	(0.2)	0.6
Deferred income tax expense (benefit), State	2.5	0.9	4.5
Deferred income tax expense (benefit), Total	(0.9)	(1.2)	8.7
Tax expense at effective rate	$ 74.5	$ 57.7	$ 57.4