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Stockholders' Equity - (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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	600,000		600,000
Equity-based compensation expense	$ (0.9)	$ 3.5	$ 7.2	$ 7.0
Payment, Tax Withholding, Share-based Payment Arrangement	0.1	0.1	4.1	4.7
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	15.8		15.8
Share-based Payment Arrangement, Expense, Tax Benefit	(0.5)	0.9	0.8	1.7
Proceeds from Stock Options Exercised	0.2	0.0	1.3	0.0
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	$ 0.6	$ 0.8	$ 1.7	$ 2.3
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			221,319
Grant-date fair value of awards per share			$ 38.18
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	120,000	0	139,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			163,310
Grant-date fair value of awards per share			$ 40.17
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	94,000	0	112,000

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