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Share-Based Compensation - Additional Information (Detail) - USD ($) $ 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]
Recognized share-based compensation awards	$ 1.9	$ 1.2	$ 5.8	$ 3.1
Option exercised, intrinsic value			0.3	0.1
Non-Employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from employee stock option exercised	$ 0.1	$ 0.3	$ 0.4	$ 1.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	8,000	25,000	28,000	101,000
Option exercised, intrinsic value	$ 0.1	$ 0.1
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock awards granted	0	345,000	341,000	733,000
Number of Options, Granted	0	0	25,000	0

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- Definition

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

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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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