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Share-Based Employee Compensation - Additional Information (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 19, 2021 | Aug. 31, 2023 | May 31, 2023 | May 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Aug. 03, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for future grant |  |  |  |  | 1,411,804 |  | 1,411,804 |  |
Reserved future issuance |  |  |  |  |  |  |  |  | 1,425,000
Stock option expense |  |  |  |  | $ 0.5 | $ 0.8 | $ 1.5 | $ 2.7 |
Aggregate intrinsic value for outstanding options |  |  |  |  | 34.4 |  | 34.4 |  |
Aggregate intrinsic value for exercisable options |  |  |  |  | 24.6 |  | 24.6 |  |
Total intrinsic value of options exercised |  |  |  |  |  |  | 10.6 |  |
Restricted stock or unit expense |  |  |  |  | 4.0 | $ 3.3 | $ 13.8 | $ 11.0 |
Options granted |  |  |  |  |  |  | 5,558 |  |
Long Term Compensation Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  | 10.00% |  |  |  |  |  |
Long Term Compensation Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  | 20.00% |  |  |  |  |  |
Performance Vesting Stock Options [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  |  |  |  |  | 10.00% |  |
Performance Vesting Stock Options [Member] | Long Term Compensation Plan [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for future grant |  |  | 2,296 |  |  |  |  |  |
Percentage of average return on invested capital |  |  |  |  |  |  | 20.00% |  |
Reduced percentage of shares earned in stock options plan |  |  |  |  |  |  | 66.70% |  |
Stock based compensation plan, description |  |  |  |  |  |  | The performance criteria for the Fiscal 2024 Employee Performance Stock Option Award are based upon the achievement of certain levels of return on equity (as defined in the option agreements), ranging from 10.0% to 20.0%, for the performance periods described in the table below. All stock options in each performance period will be earned if the return on equity is 20.0% or greater. If the return on equity is less than 20% but at least 10% in any performance period, the amount of stock options earned in such period will be reduced proportionately using straight-line interpolation, such that approximately 66.7% of the amount of stock options granted will be earned if the return on equity is 10.0%. If the Company does not achieve a return on equity of at least 10.0% during any performance period, all stock option awards for that performance period will be forfeited. |  |
Share-based compensation award expiration term |  |  | 10 years |  |  |  |  |  |
Performance Vesting Stock Options [Member] | Long Term Compensation Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  | 10.00% |  |  |  |  |  |
Performance Vesting Stock Options [Member] | Long Term Compensation Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  | 20.00% |  |  |  |  |  |
Time Vesting Stock Options [Member] | Long Term Compensation Plan [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for future grant |  |  | 1,914 |  |  |  |  |  |
Share-based compensation vesting period |  |  | 3 years |  |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted-average period of recognition of unrecognized compensation cost |  |  |  |  |  |  | 1 year 10 months 24 days |  |
Unrecognized compensation cost |  |  |  |  | 2.2 |  | $ 2.2 |  |
Employee Stock Option | Long Term Compensation Plan [Member] | Board of Directors [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based compensation award expiration term |  | 10 years |  |  |  |  |  |  |
Options granted |  | 1,348 |  |  |  |  |  |  |
Performance Vesting Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for future grant |  |  |  | 45,693 |  |  |  |  |
Percentage of average return on invested capital |  |  |  |  |  |  | 20.00% |  |
Stock based compensation plan, description |  |  |  |  |  |  | The performance criteria for the Fiscal 2024 Employee Restricted Stock Performance Award are based upon the achievement of certain levels of return on equity (as defined in the award agreement), ranging from 10.0% to 20.0%, for the performance periods described in the table below. All restricted shares in each performance period will be earned if the return on equity is 20.0% or greater. If the return on equity is less than 20% but at least 10% in any performance period, the amount of shares earned in such period will be reduced proportionately using straight-line interpolation, such that approximately 66.7% of the amount of shares issued will be earned if the return on equity is 10.0%. If the Company does not achieve a return on equity of at least 10.0% during any performance period, all awards for that performance period will be forfeited. |  |
Reduced percentage of restricted shares |  |  |  |  |  |  | 66.70% |  |
Performance Vesting Restricted Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  | 10.00% | 10.00% |  |  | 10.00% |  |
Performance Vesting Restricted Stock [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Percentage of average return on invested capital |  |  | 20.00% | 20.00% |  |  |  |  |
Time Vesting Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for future grant |  |  | 38,072 |  |  |  |  |  |
Share-based compensation vesting period | 3 years |  | 3 years |  |  |  |  |  |
Time Vesting Restricted Stock [Member] | Board of Directors [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based compensation vesting period |  |  | 1 year |  |  |  |  |  |
Share-based compensation award expiration term |  |  | 1 year |  |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted-average period of recognition of unrecognized compensation cost |  |  |  |  |  |  | 1 year 8 months 12 days |  |
Unrecognized compensation cost |  |  |  |  | $ 21.5 |  | $ 21.5 |  |
Restricted Stock [Member] | Board of Directors [Member] |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for future grant |  | 10,755 |  |  |  |  |  |  |

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