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Debt and Available Credit Facilities (Details) - USD ($)
$ in Thousands

3 Months Ended

Jul. 31, 2022

Jul. 31, 2021

Apr. 30, 2022

May 30, 2019

Components of Total Debt Outstanding [Abstract]

Short-term portion of long-term debt

^[1]

$ 21,875

$ 18,750

Long-term debt, less current portion

917,236

768,277

Total debt

939,111

787,027

Unamortized issuance costs

$ 300

300

Amended and Restated RCA [Member]

Debt and Available Credit Facilities [Abstract]

Term of credit facility

5 years

Amortization expense of the lender and non-lender fees in interest expense

$ 300

$ 300

Term Loan A Facility [Member]

Debt and Available Credit Facilities [Abstract]

Term of credit facility

5 years

Term Loan A Facility [Member] | Amended and Restated RCA [Member]

Components of Total Debt Outstanding [Abstract]

Long-term debt, less current portion

^[2]

$ 198,135

204,343

Debt and Available Credit Facilities [Abstract]

Credit agreement face amount

$ 250,000

Revolving Credit Facility [Member]

Debt and Available Credit Facilities [Abstract]

Term of credit facility

5 years

Revolving Credit Facility [Member] | Amended and Restated RCA [Member]

Components of Total Debt Outstanding [Abstract]

Long-term debt, less current portion

$ 719,101

$ 563,934

Debt and Available Credit Facilities [Abstract]

Amount of financing available under credit facilities

$ 1,250,000

Line of Credit [Member]

Debt and Available Credit Facilities [Abstract]

Weighted average interest rate on total debt outstanding during the period

2.83%

2.02%

Weighted average interest rate on total debt at period end

2.99%

2.55%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member]

Debt and Available Credit Facilities [Abstract]

Optional credit limit increase available on request

$ 500,000

Minimum increments in which optional credit limit increase may be requested

50,000

Unused borrowing capacity under our Amended and Restated RCA and other facilities

$ 531,900

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | Minimum [Member]

Debt and Available Credit Facilities [Abstract]

Line of credit facility fee percentage

0.15%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | Maximum [Member]

Debt and Available Credit Facilities [Abstract]

Line of credit facility fee percentage

0.25%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | LIBOR [Member] | Minimum [Member]

Debt and Available Credit Facilities [Abstract]

Applicable margin

0.98%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | LIBOR [Member] | Maximum [Member]

Debt and Available Credit Facilities [Abstract]

Applicable margin

1.50%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | Base Rate [Member] | Minimum [Member]

Debt and Available Credit Facilities [Abstract]

Applicable margin

0.00%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | Base Rate [Member] | Maximum [Member]

Debt and Available Credit Facilities [Abstract]

Applicable margin

0.50%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | Federal Funds Effective Rate [Member]

Debt and Available Credit Facilities [Abstract]

Margin rate over reference rate used in determining base rate

0.50%

Syndicate Bank Group led by Bank of America [Member] | Revolving Credit Facility [Member] | Amended and Restated RCA [Member] | Eurocurrency Rate [Member]

Debt and Available Credit Facilities [Abstract]

Margin rate over reference rate used in determining base rate

1.00%

[1]	Relates to our term loan A under the Amended and Restated RCA.
[2]	Amounts are shown net of unamortized issuance costs of $0.3 million as of July 31, 2022 and $0.3 million as of April 30, 2022.

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- Definition

Amount of amortization expense attributable to debt issuance costs.

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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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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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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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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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