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Debt Instrument, Available Increase in Borrowing Capacity

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Debt Instrument, Restrictive Covenant, Maximum Consolidated Net Leverage Ratio

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Standby Letters of Credit

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Debt - Narrative (Details) £ in Millions			9 Months Ended
Debt - Narrative (Details) £ in Millions	Feb. 28, 2023 USD ($)	Oct. 27, 2021 USD ($)	Feb. 28, 2023 USD ($)	May 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Sep. 23, 2019 GBP (£)
Debt (Details) [Line Items]
Debt	$ 5,200,000		$ 5,200,000	$ 6,500,000	$ 13,700,000
Standby letters of credit	4,100,000		4,100,000
Domestic Line of Credit
Debt (Details) [Line Items]
Standby letters of credit	3,700,000		3,700,000
Revolving Credit Facility
Debt (Details) [Line Items]
Long-term Debt	0		0
Debt	0		0	0	0
Standby letters of credit	$ 400,000		$ 400,000
Loan Agreement
Debt (Details) [Line Items]
Maximum borrowing capacity		$ 300,000,000.0
Commitment fee percentage			0.20%
Consolidated net leverage ratio, maximum		2.75
Increase in borrowing capacity available under accordion feature		$ 150,000,000.0
Debt Instrument, Term		5 years
Loan Agreement \| Minimum
Debt (Details) [Line Items]
Commitment fee percentage		0.20%
Loan Agreement \| Maximum
Debt (Details) [Line Items]
Commitment fee percentage		0.30%
Loan Agreement \| Swingline Facility
Debt (Details) [Line Items]
Maximum borrowing capacity		$ 15,000,000.0
Loan Agreement \| Revolving Credit Facility
Debt (Details) [Line Items]
Maximum borrowing capacity		$ 50,000,000.0
Loan Agreement \| Eurodollar
Debt (Details) [Line Items]
Variable rate (percentage)		1.00%
Loan Agreement \| Base Rate
Debt (Details) [Line Items]
Variable rate (percentage)			0.35%
Loan Agreement \| Base Rate \| Minimum
Debt (Details) [Line Items]
Variable rate (percentage)		0.35%
Loan Agreement \| Base Rate \| Maximum
Debt (Details) [Line Items]
Variable rate (percentage)		0.75%
Loan Agreement \| Federal Funds Rate
Debt (Details) [Line Items]
Variable rate (percentage)		0.50%
Loan Agreement \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt (Details) [Line Items]
Variable rate (percentage)	0.10%		1.35%
Loan Agreement \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt (Details) [Line Items]
Variable rate (percentage)	1.35%
Loan Agreement \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum
Debt (Details) [Line Items]
Variable rate (percentage)	1.75%
UK Loan
Debt (Details) [Line Items]
Debt	$ 0		$ 0	0	6,900,000
Short-term debt					2,700,000
Face amount of debt \| £						£ 2.0
UK Loan \| Line of Credit
Debt (Details) [Line Items]
Short-term debt					4,200,000
Unsecured Debt \| Domestic Line of Credit
Debt (Details) [Line Items]
Borrowing capacity	10,000,000.0		10,000,000.0
Short-term debt	0		$ 0	0	0
Expiration period (in days)			365 days
Remaining borrowing capacity	6,300,000		$ 6,300,000
Unsecured Debt \| Line of Credit
Debt (Details) [Line Items]
Borrowing capacity	24,300,000		24,300,000
Debt	$ 5,200,000		$ 5,200,000	$ 6,500,000	$ 6,800,000
Expiration period (in days)			364 days
Weighted average interest rate (percentage)	5.00%		5.00%	5.40%	5.10%
Remaining borrowing capacity	$ 19,100,000		$ 19,100,000