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
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