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Retirement eligible provision minimum term of service.

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- Definition

The contractual term of stock options, after which the stock options will expire.

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No definition available.

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Share-Based Compensation Arrangement By Share-Based Payment Award, Restricted Stock Granted, As A Percentage Of Purchased Shares

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Unrecognized Compensation Costs for Nonvested Share-Based Awards Weighted Average Period of Recognition

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

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

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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 additional cost recognized for award under share-based payment arrangement from occurrence of event accelerating recognition of cost.

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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 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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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity Incentive Plans - Additional Information (Detail) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retirement eligible provision, minimum age	62 years
Retirement eligible provision, minimum years of service	7 years
Share-based compensation expense	$ 45.1	$ 45.7	$ 31.0
Income tax benefits	9.4	9.3	6.8
Unrecognized compensation cost	$ 64.4
Unrecognized Compensation Costs for Nonvested Share-Based Awards Weighted Average Period	2.8
Share-Based Payment Arrangement, Accelerated Cost	$ 0.5
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Aggregate fair value of stock vested	$ 40.3	$ 27.6	$ 18.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares	$ 98.94	$ 80.84	$ 49.69
Performance-based stock activity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Aggregate fair value of stock vested	$ 25.9	$ 5.9	$ 5.8
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares	$ 99.40	$ 80.89	$ 48.22
Performance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 1.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares	$ 39.10	$ 32.27	$ 17.00
Weighted-average remaining contractual term (years), options exercisable	4 years 6 months
Time Vested Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining contractual term (years), options exercisable	3 years 9 months 18 days
Share-based Payment Arrangement, Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options contractual term	10 years
Share-based Payment Arrangement, Option [Member] \| Performance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 0.8
Share-based Payment Arrangement, Option [Member] \| Time Vested Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 1.5	$ 0.5
Time Vested Stock Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options contractual term	7 years
Performance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options contractual term	7 years
Two Thousand And Twelve Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance \| shares	800,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized \| shares	5,400,000
Stock Ownership Participation Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance \| shares	200,000
Restricted stock granted as a percentage of purchased shares	0.25
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized \| shares	900,000