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Pension and Profit Sharing Plans - Schedule of Reconciliation of Obligations and Fair Values of Plan Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Retirement Benefits [Abstract] |  |  |
Benefit Obligation at April 1, | $ 33,909 | $ 35,844 |
Interest Cost on Projected Benefit Obligation | 1,240 | 1,167 | $ 1,216
Actuarial Gain | (4,509) | (1,776) |
Benefits Paid | (1,451) | (1,326) |
Benefit Obligation at March 31, | 29,189 | 33,909 | 35,844
Fair Value of Plan Assets at April 1, | 36,313 | 37,907 |
Actual Return on Plan Assets | (3,756) | (268) |
Benefits Paid | (1,451) | (1,326) |
Fair Value of Plan Assets at March 31, | 31,106 | 36,313 | $ 37,907
Funded Status at March 31, | 1,917 | 2,404 |
Other Assets | 1,917 | 2,404 |
Accumulated Other Comprehensive Losses - Net Actuarial Loss | 4,662 | 4,172 |
Accumulated Other Comprehensive Losses | 4,662 | 4,172 |
Tax Impact | (1,115) | (997) |
Accumulated Other Comprehensive Losses, net of tax | $ 3,547 | $ 3,175 |

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