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Debt and Available Credit Facilities (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Nov. 30, 2022	Jan. 31, 2024	Apr. 30, 2023	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Long-term Debt, by Current and Noncurrent [Abstract]
Short-term portion of long-term debt		$ 6,250	$ 5,000		$ 6,250
Long-term debt, less current portion		900,524	743,292		900,524
Total debt		906,774	748,292		906,774
Unamortized debt issuance costs		600	700		600
Debt and Available Credit Facilities [Abstract]
Payment of debt issuance cost					$ 0	$ 4,493
Amended and Restated RCA
Debt and Available Credit Facilities [Abstract]
Term of credit facility					5 years
Amortization of debt issuance costs		300		$ 300	$ 900	$ 800
Revolving Credit Facility Through November 2027
Debt and Available Credit Facilities [Abstract]
Term of credit facility					18 months
Revolving Credit Facility \| Amended and Restated RCA
Long-term Debt, by Current and Noncurrent [Abstract]
Long-term debt, less current portion		713,646	551,535		$ 713,646
Debt and Available Credit Facilities [Abstract]
Term of credit facility	5 years
Amount of financing available under credit facilities	$ 1,115,000
Payment of debt issuance cost			4,500
Costs related to agreements, net			5,800
Write off of deferred costs				$ (200)
Existing credit commitments		587,400			587,400
Revolving Credit Facility \| Amended and Restated RCA \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Optional credit limit increase available on request	500,000
Value of minimum increments	$ 50,000
Revolving Credit Facility \| Amended and Restated RCA \| Minimum \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Line of credit facility fee percentage	0.15%
Revolving Credit Facility \| Amended and Restated RCA \| Maximum \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Line of credit facility fee percentage	0.25%
Revolving Credit Facility \| SOFR, SONIA, and EURIBOR-Based Rates \| Amended and Restated RCA \| Minimum \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Applicable margin	0.98%
Revolving Credit Facility \| SOFR, SONIA, and EURIBOR-Based Rates \| Amended and Restated RCA \| Maximum \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Applicable margin	1.50%
Revolving Credit Facility \| Base Rate \| Amended and Restated RCA \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Margin rate over reference rate used in determining base rate	0.50%
Revolving Credit Facility \| Base Rate \| Amended and Restated RCA \| Minimum \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Applicable margin	0.00%
Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) \| Amended and Restated RCA \| Minimum
Debt and Available Credit Facilities [Abstract]
Margin rate (as a percent)	0.10%
Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) \| Amended and Restated RCA \| Maximum
Debt and Available Credit Facilities [Abstract]
Margin rate (as a percent)	0.25%
Revolving Credit Facility \| Federal Funds Effective Rate \| Amended and Restated RCA \| Maximum \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Applicable margin	0.50%
Revolving Credit Facility \| Daily Secured Overnight Financing Rate (SOFR) \| Amended and Restated RCA \| Syndicate Bank Group led by Bank of America
Debt and Available Credit Facilities [Abstract]
Margin rate over reference rate used in determining base rate	1.00%
Term Loan A Facility \| Amended and Restated RCA
Long-term Debt, by Current and Noncurrent [Abstract]
Long-term debt, less current portion		$ 186,878	191,757		$ 186,878
Debt and Available Credit Facilities [Abstract]
Term of credit facility	5 years
Debt instrument, face amount	$ 200,000
Costs related to agreements, net			800
Lender fees			800
Non-lender fees			100
Revolving Credit Facility Through May 2024 \| Amended and Restated RCA
Debt and Available Credit Facilities [Abstract]
Amount of financing available under credit facilities	$ 185,000
Costs related to agreements, net			200
Revolving Credit Facility Through November 2027 \| Amended and Restated RCA
Debt and Available Credit Facilities [Abstract]
Costs related to agreements, net			$ 4,800
Line of Credit
Debt and Available Credit Facilities [Abstract]
Average interest rates on total debt outstanding		5.66%		4.70%	5.52%	3.78%
Weighted average interest rates		5.50%	4.76%		5.50%