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Debt and Available Credit Facilities (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Nov. 30, 2022	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Apr. 30, 2022
Long-term Debt, by Current and Noncurrent [Abstract]
Short-term portion of long-term debt		$ 5,000		$ 5,000		$ 18,750
Long-term debt, less current portion		940,576		940,576		768,277
Total debt		945,576		945,576		787,027
Unamortized debt issuance costs		800		800		300
Debt and Available Credit Facilities [Abstract]
Payment of debt issuance costs				$ 4,493	$ 0
Amended and Restated RCA
Debt and Available Credit Facilities [Abstract]
Term of credit facility				5 years
Amortization of debt issuance costs		300	$ 300	$ 800	$ 800
Revolving Credit Facility \| Amended and Restated RCA
Long-term Debt, by Current and Noncurrent [Abstract]
Long-term debt, less current portion		747,610		747,610		563,934
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 costs		4,500
Costs related to agreements, net		5,800		5,800
Write off of deferred costs				(200)
Existing credit commitments		553,400		553,400
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		500,000
Minimum increments in which optional credit limit increase may be requested		50,000		$ 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		192,966		$ 192,966		$ 204,343
Debt and Available Credit Facilities [Abstract]
Term of credit facility	5 years
Debt instrument, face amount	$ 200,000
Costs related to agreements, net		800		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		200
Revolving Credit Facility Through November 2027 \| Amended and Restated RCA
Debt and Available Credit Facilities [Abstract]
Costs related to agreements, net		$ 4,800		$ 4,800
Line of Credit
Debt and Available Credit Facilities [Abstract]
Average interest rates on total debt outstanding		4.70%	1.94%	3.78%	1.96%
Weighted average interest rates		4.97%		4.97%		2.55%