Employee Pension Plans - Summary of Defined Benefit Plan's Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	May 31, 2022	May 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	$ 83,393	$ 33,136
Quoted Prices In Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	52,823	33,136
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	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	1,238
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value		1,664
Money Market Funds | Quoted Prices In Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value		1,664
Fixed-Income Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	11,287	12,629
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	11,287	12,629
Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	37,352	16,022
Equity Funds | Quoted Prices In Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	37,352	16,022
Administrative Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	2,946	2,821
Administrative Funds | Quoted Prices In Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	2,946	$ 2,821
Hedge Funds | Commingled Fund Investments Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit plan assets fair value	$ 9,514