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Share-Based Payment Arrangement, Return on Net Capital Employed

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Share Based Payment Arrangement, Settlement Based On Total Shareholder Return

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

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Amount of discretionary contributions made by an employer to a 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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Percentage employer matches of the employee's percentage contribution matched.

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Maximum percentage of employee gross pay the employee may contribute 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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Amount of cash inflow 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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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 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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation and Other Benefit Plans - Narrative (Details) - USD ($)		12 Months Ended			84 Months Ended
	Jan. 01, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	May 31, 2023	May 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)		0			0
Intrinsic value of options exercised		$ 400,000
Proceeds from options exercised		600,000
Tax benefits from exercise of stock options		100,000
Share-based compensation expense		$ 0	$ 0
Options exercised (in shares)		140,460	0	0
Maximum annual contributions per employee (percent)		50.00%
Employer discretionary contribution amount		$ 3,200,000	$ 2,500,000	$ 2,200,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Expiration period		10 years
Share-based compensation expense				0
Restricted Stock Units and Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 6,400,000	6,700,000	7,700,000
Restricted stock awards		$ 8,800,000			$ 8,800,000
Period for recognition		1 year 9 months 18 days
Fair value of shares vested		$ 8,000,000	9,400,000	5,300,000
Tax benefit from compensation expense		$ 1,800,000	1,800,000	1,100,000
Restricted Stock Units and Restricted Stock Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Restricted Stock Units and Restricted Stock Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Share-based compensation expense		$ 3,800,000	3,400,000	3,900,000
Restricted stock awards		6,700,000	6,500,000		$ 6,700,000
Share based payment arrangement settlement based on total shareholder return		1,800,000
Return on net capital employed		$ 700,000
The 2014 Director Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)						2,000,000	1,400,000
Shares available for grant (in shares)		500,000			500,000
The 2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)						16,500,000	15,300,000
Shares available for grant (in shares)		2,500,000			2,500,000
2023 Awards \| Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Share-based compensation expense		$ 2,500,000
2022 Awards \| Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Share-based compensation expense			$ 2,800,000
2022 Awards \| Time-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of payout of shares for each executive, minimum		0.00%
Range of payout of shares for each executive, maximum		200.00%
2021 Awards \| Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Share-based compensation expense				3,000,000
2021 Awards \| Time-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense				$ 1,400,000
Participants Contributions Up to 3 Percent of Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percent of employees' gross pay	4.00%	4.00%
Employer matching contribution, percent of match	100.00%	100.00%
Participants Contributions from 3 Percent to 6 Percent of Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percent of match	50.00%	50.00%
Participants Contributions from 3 Percent to 6 Percent of Compensation \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percent of employees' gross pay	4.00%	5.00%
Participants Contributions from 3 Percent to 6 Percent of Compensation \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution, percent of employees' gross pay	6.00%	6.00%