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Stockholders' Equity and Earnings Per Common Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Oct. 25, 2021
Outstanding Restricted Stock and Stock Success Unit Grant Prices Lower Limit |  | $ 12.45 |  | $ 12.45 |  |
Outstanding Restricted Stock and Stock Success Unit Grant Prices Upper Limit |  | $ 36.45 |  | $ 36.45 |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share |  | 100,000 | 300,000 | 200,000 | 900,000 |
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program |  |  |  |  |  | $ 250.0
Expiration Date of Share Repurchase Program Authorized in October 2021 |  |  |  | Dec. 31, 2022 |  |
Number of Treasury Shares Repurchased |  | 1,735,500 | 0 | 3,078,600 | 0 |
Cost of Shares Repurchased | [1] | $ 57.4 | $ 0.0 | $ 94.9 | $ 0.0 |
Remaining Amount of Treasury Share Repurchases Authorized Under Stock Repurchase Program |  | $ 105.1 |  | $ 105.1 |  |
Authorized Shares of Preferred Stock |  | 25,000,000.0 |  | 25,000,000.0 |  |
Par Value Per Share of Preferred Stock |  | $ 0.10 |  | $ 0.10 |  |
Issued Shares of Preferred Stock |  | 0 |  | 0 |  |
Accelerated Share Repurchase Agreement [Member] |  |  |  |  |  |
Number of Treasury Shares Repurchased |  |  |  | 1,700,000 |  |
Cost of Shares Repurchased |  |  |  | $ 50.0 |  |
Open Market Share Repurchases [Member] |  |  |  |  |  |
Number of Treasury Shares Repurchased |  |  |  | 1,400,000 |  |
Cost of Shares Repurchased |  |  |  | $ 44.9 |  |
[1] | Includes commissions of $0.1 million for the three and six months ended June 30, 2022.

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