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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accumulated benefit obligation | $ 184,800 | $ 170,300 |
Company's expected contribution to defined benefit pension plans in next fiscal year | 8,500 |  |
Expense for defined contribution plans | $ 14,400 | 14,400 | $ 13,900
Deferred Compensation Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of vested salary and incentive compensation deferrals permitted to eligible employees (as a percent) | 100.00% |  |
Investments for deferred compensation plan | $ 29,174 | 28,213 |
Deferred Compensation Plan | Other assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Investments for deferred compensation plan | 29,200 | 28,200 |
Deferred Compensation Plan | Other liabilities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Investments for deferred compensation plan | $ 29,200 | $ 28,200 |
Equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations (as a percent) | 33.00% |  |
Debt securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations (as a percent) | 28.00% |  |
Real estate funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations (as a percent) | 28.00% |  |
Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations (as a percent) | 4.00% |  |

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