Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total income tax provision	$ 164.9	$ 155.8	$ 87.9
Effective tax rate	26.20%	25.60%	25.00%
Unrecognized tax benefits	$ 0.4	$ 0.5	$ 1.0
Accrued interest and penalties	0.1	0.1
Domestic Tax Authority [Member]
Valuation allowance	$ 1.1	$ 0.8

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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