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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accumulated benefit obligation | $ 170,300 | $ 178,500 |
Company's expected contribution to defined benefit pension plans in next fiscal year | 9,400 |  |
Expense for defined contribution plans | $ 14,400 | 13,900 | $ 10,600
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 | $ 28,213 | 28,431 |
Deferred Compensation Plan | Other Assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Investments for deferred compensation plan | 28,200 | 28,400 |
Deferred Compensation Plan | Other Liabilities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Investments for deferred compensation plan | $ 28,200 | $ 28,400 |
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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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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