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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for future grants | 3,206,045 |  |
Stock options granted | 295,068 | 284,109 | 192,700
Stock-based compensation expense | $ 3,514 | $ 565 | $ 3,251
Stock-based compensation expense, net of tax | $ 368 | $ 2,996 | $ 634
Market price per unit of stock award | $ 71.53 | $ 58.05 | $ 75.32
Unrecognized compensation expense associated with non-vested incentive awards outstanding | $ 49,054 |  |
Nonvested stock, weighted average remaining contractual term | 29 months |  |
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Market price per unit of stock award | $ 71.53 |  |
Stock unit grant during period | 324,262 |  |
Restricted Shares Restricted Stock Units and Market Share Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 16,303 | $ 17,784 | $ 19,357
Stock unit grant during period | 1,435 | 1,147 | 1,441
Equity-based compensation expense, tax benefit | $ 2,121 | $ 2,544 | $ 3,085
Non Employee Directors | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock units granted (in shares) | 39,726 | 40,462 | 35,065
Market price per unit of stock award | $ 39.93 | $ 39.74 | $ 46.30
Management | Nonqualified Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options granted | 295,068 |  |
Vesting period, in years | 3 years |  |
Management | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Market price per unit of stock award | $ 75.39 | $ 57.75 | $ 75.17
Stock unit grant during period | 283,101 | 301,321 | 204,599
Management | Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Market price per unit of stock award |  | $ 50.69 | $ 68.48
Stock unit grant during period |  | 62,512 | 45,883
Management | Market Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Market price per unit of stock award |  | $ 62.05 | $ 86.23
Stock unit grant during period |  | 51,063 | 36,646
Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for future grants | 4,173,554 |  |
Stock Options Issued In Fiscal 2010 | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options expiration period (in years) | 10 years |  |

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