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v3.23.2

Debt - Narrative (Details) £ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 28, 2023 | Oct. 27, 2021 USD ($) | May 31, 2023 USD ($) | May 31, 2022 USD ($) | Sep. 23, 2019 GBP (£)
Debt Instrument [Line Items] |  |  |  |  |
Debt |  |  | $ 6,000,000.0 | $ 6,500,000 |
Loan Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Standby letters of credit |  |  | (400,000) |  |
Line of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt |  |  | 6,000,000.0 | 6,500,000 |
Line of Credit | Unsecured Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing capacity |  |  | 24,500,000 |  |
Remaining borrowing capacity |  |  | 18,500,000 |  |
Debt |  |  | $ 6,000,000.0 |  |
Line of Credit | Secured Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of Credit Facility, Expiration Period |  |  | 364 days |  |
Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding borrowings |  |  | $ 0 |  |
Domestic Line of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Standby letters of credit |  |  | (3,400,000) |  |
Domestic Line of Credit | Unsecured Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing capacity |  |  | 10,000,000.0 |  |
Outstanding borrowings |  |  | 0 | 0 |
Remaining borrowing capacity |  |  | $ 6,600,000 |  |
Line of Credit Facility, Expiration Period |  |  | 365 days |  |
Standby Letters of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Open standby letters of credit |  |  | $ 3,800,000 | 4,100,000 |
UK Long-term Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Face amount | £ |  |  |  |  | £ 2.0
Debt |  |  |  | $ 0 |
Loan Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Term of debt instrument |  | 5 years |  |  |
Debt instrument, restrictive covenant, maximum consolidated net leverage ratio |  | 2.75 |  |  |
Line of credit facility, commitment fee percentage |  |  | 0.20% |  |
Maximum borrowing capacity |  | $ 300,000,000.0 |  |  |
Debt instrument, available increase in borrowing capacity |  | $ 150,000,000.0 |  |  |
Loan Agreement | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, commitment fee percentage |  | 0.20% |  |  |
Loan Agreement | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, commitment fee percentage |  | 0.30% |  |  |
Loan Agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate | 0.10% |  | 1.35% |  |
Loan Agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate | 1.35% |  |  |  |
Loan Agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate | 1.75% |  |  |  |
Loan Agreement | Federal Funds Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 0.50% |  |  |
Loan Agreement | Eurodollar |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 1.00% |  |  |
Loan Agreement | Base Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  |  | 0.35% |  |
Loan Agreement | Base Rate | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 0.35% |  |  |
Loan Agreement | Base Rate | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 0.75% |  |  |
Loan Agreement | Swingline Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  | $ 15,000,000.0 |  |  |
Loan Agreement | Letter of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity |  | $ 50,000,000.0 |  |  |

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