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Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan (Detail) - USD ($) $ / shares in Units, $ in Millions | Apr. 06, 2023 | Mar. 31, 2023 | Feb. 09, 2023
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock shares available for grant (in shares) |  | 3,466,957 |
Semi Annual Regular Dividend |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends payable amount per share (in dollars per share) |  |  | $ 0.25
Unvested Restricted Stock and Deferred Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends payable |  |  | $ 10.3
Unvested Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends payable |  | $ 12.0 |
Unvested Restricted Stock | Subsequent Event |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends payable | $ 2.2 |  |
2013 Omnibus Equity Incentive Plan | Unvested Restricted Stock and Deferred Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends payable |  |  | $ 0.5
2013 Omnibus Equity Incentive Plan | Unvested Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends payable |  | $ 2.2 |

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