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Employee Pension Plans - Summary of Defined Benefit Plan's Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | May 31, 2023 | May 31, 2022
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Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | $ 72,985 | $ 83,393
Quoted Prices In Active Markets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 64,172 | 52,823
Cash and Cash Equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 13,935 | 1,238
Cash and Cash Equivalents | Quoted Prices In Active Markets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 13,935 | 1,238
Fixed-Income Funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 30,168 | 11,287
Fixed-Income Funds | Commingled Fund Investments Measured at Net Asset Value |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value |  | 21,056
Fixed-Income Funds | Quoted Prices In Active Markets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 30,168 | 11,287
Equity Funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 20,069 | 37,352
Equity Funds | Quoted Prices In Active Markets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | 20,069 | 37,352
Administrative Funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value |  | 2,946
Administrative Funds | Quoted Prices In Active Markets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value |  | 2,946
Hedge Funds | Commingled Fund Investments Measured at Net Asset Value |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit plan assets fair value | $ 8,813 | $ 9,514

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