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Share-Based Employee Compensation - Additional Information (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 19, 2021 | May 31, 2023 | May 31, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | May 17, 2023 | Aug. 07, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares available for future grant |  |  |  | 3,211,864 |  |  | 3,000,000
Share-based compensation expiration date |  |  |  | Aug. 07, 2023 |  |  |
Stock option expense |  |  |  | $ 0.5 | $ 0.8 |  |
Aggregate intrinsic value for outstanding options |  |  |  | 30.7 |  |  |
Aggregate intrinsic value for exercisable options |  |  |  | 22.3 |  |  |
Total intrinsic value of options exercised |  |  |  | 9.2 |  |  |
Restricted stock or unit expense |  |  |  | $ 6.0 | 4.3 |  |
Options granted |  |  |  | 4,210 |  |  |
2023 Plan [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share based compensation, stock option reserved for future grants |  |  |  |  |  | 1,425,000 |
Stock Awards [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares available for future grant |  |  |  |  |  |  | 1,500,000
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 Grant 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 fiscal years ending March 31, 2024, through March 31, 2026. All stock options in each performance period will be earned if the return on equity is 20.0% or greater, and the percentage of stock options earned in such period will be reduced proportionately to approximately 66.7% if the return on equity is 10.0%. If the Company does not achieve a return on equity of at least 10.0% during the 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 |  |  |  | 2 years 2 months 12 days |  |  |
Unrecognized compensation cost |  |  |  | $ 3.1 |  |  |
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 fiscal years ending March 31, 2024, through March 31, 2026. All restricted shares in each performance period will be earned if the return on equity is 20.0% or greater, and the percentage of shares earned in such period will be reduced proportionately to approximately 66.7% if the return on equity is 10.0%. If the Company does not achieve a return on equity of at least 10.0% during the 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% |  |  |
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% |  |  |  |
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 |  | 4 years |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted-average period of recognition of unrecognized compensation cost |  |  |  | 2 years 2 months 12 days |  |  |
Unrecognized compensation cost |  |  |  |  | $ 27.1 |  |

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