Excess Tax Expense - Share Based Compensation

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RTSR Modifier

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Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost for defined contribution plan.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Share-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended			36 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	May 19, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for awards, shares	8,023,671			8,023,671
Common stock reserved for future awards, shares					10,000,000
Stock-based employee compensation expense	$ 23.9	$ 19.0	$ 16.7
Related tax benefits	7.7	3.6	4.0
Unrecognized compensation cost related to nonvested awards	$ 20.8			$ 20.8
Weighted-average remaining requisite service period, years	1 year 7 months 6 days
RTSR Modifier	25.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.50%
401(k) match, profit sharing and non-elective expense	$ 50.7	39.1	$ 39.1
Excess Tax Expense - Share Based Compensation		$ 0.4
Share-Based Payment Arrangement, Exercise of Option, Tax Benefit	$ 2.9
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	500,968
Shares nonvested	1,066,916	798,515		1,066,916
Shares vesting period, (years)				3 years
Granted, Weighted Average Grant Date Fair Value	$ 27.38
Restricted Stock Units (RSUs) \| Share-based Payment Arrangement, Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares nonvested	67,611			67,611
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	272,609			272,609
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	649,088	566,086	973,885
Shares nonvested	1,558,509	1,505,740		1,558,509
Shares vesting period, (years)				3 years
Granted, Weighted Average Grant Date Fair Value	$ 28.87
Performance Shares \| NOEPS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted	$ 13.3		$ 6.5
Performance Shares \| CVI
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted			$ 6.7
2019 Award \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			285,755
Shares nonvested	158,797			158,797
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value			$ 5.7
2020 award \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		477,292
Shares nonvested	385,062			385,062
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value		$ 12.5
2021 award \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	500,968
Shares nonvested	464,725			464,725
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value	$ 13.7
2021 award \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		582,944
2021 award \| Performance Shares \| NOEPS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares nonvested	186,427			186,427
2021 award \| Performance Shares \| CVI
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares nonvested	186,427			186,427
2021 Special award \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			390,041