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Pension and Profit Sharing Plans - Schedule of Fair Values of Defined Benefit Plans (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
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Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair values of defined benefit plans | $ 29,492 | $ 30,124 | $ 31,106
Equity Securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair values of defined benefit plans | 0 | 0 |
Fixed Income Securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair values of defined benefit plans | 29,010 | 29,541 |
Cash Equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair values of defined benefit plans | $ 482 | $ 583 |

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