Stockholders' Equity - (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	800,000
Equity-based compensation expense	$ 0.7	$ 2.4
Share-based Payment Arrangement, Expense, Tax Benefit	0.2	0.6
Payment, Tax Withholding, Share-based Payment Arrangement	1.5	$ 1.6
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 17.5
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted	208,922
Grant-date fair value of awards per share	$ 29.21
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted	103,067
Grant-date fair value of awards per share	$ 30.55

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 cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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-Publisher FASB
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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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