Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Apr. 30, 2021		43,073
Beginning balance at Apr. 30, 2021	$ 822,462	$ 431	$ 542,737	$ 274,535	$ 4,759
Increase (Decrease) in Stockholders' Equity
Net income	$ 273,442			273,442
Repurchase and retirement of common stock (in shares)	(715)	(715)
Repurchase and retirement of common stock	$ (35,488)	$ (7)	(35,481)
Foreign currency translation loss	(25,805)				(25,805)
Other comprehensive income, net of tax	15,003				15,003
Equity-based compensation	10,968		10,968
Exercise of stock options (in shares)		222
Exercise of stock options	4,434	$ 2	4,432
Vesting of restricted stock units (in shares)		123
Vesting of restricted stock units	0	$ 1	(1)
Tax withholding related to net share settlements of equity awards	(2,850)		(2,850)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		70
Issuance of common stock pursuant to employee stock purchase plan	2,332	$ 1	2,331
Ending balance (in shares) at Apr. 30, 2022		42,773
Ending balance at Apr. 30, 2022	1,064,498	$ 428	522,136	547,977	(6,043)
Increase (Decrease) in Stockholders' Equity
Net income	$ 332,991			332,991
Repurchase and retirement of common stock (in shares)	(2,271)	(2,271)
Repurchase and retirement of common stock	$ (110,776)	$ (23)	(110,753)
Foreign currency translation loss	(30,088)				(30,088)
Other comprehensive income, net of tax	1,002				1,002
Equity-based compensation	13,217		13,217
Exercise of stock options (in shares)		280
Exercise of stock options	4,715	$ 3	4,712
Vesting of restricted stock units (in shares)		110
Vesting of restricted stock units	0	$ 1	(1)
Tax withholding related to net share settlements of equity awards	(4,005)		(4,005)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		79
Issuance of common stock pursuant to employee stock purchase plan	$ 3,203	$ 1	3,202
Ending balance (in shares) at Apr. 30, 2023	40,971	40,971
Ending balance at Apr. 30, 2023	$ 1,274,757	$ 410	428,508	880,968	(35,129)
Increase (Decrease) in Stockholders' Equity
Net income	$ 276,079			276,079
Repurchase and retirement of common stock (in shares)	(1,702)	(1,702)
Repurchase and retirement of common stock	$ (116,439)	$ (17)	(116,422)
Foreign currency translation loss	(4,871)				(4,871)
Other comprehensive income, net of tax	8,481				8,481
Equity-based compensation	15,618		15,618
Exercise of stock options (in shares)		276
Exercise of stock options	6,336	$ 2	6,334
Vesting of restricted stock units (in shares)		120
Vesting of restricted stock units	0	$ 1	(1)
Tax withholding related to net share settlements of equity awards	(4,026)		(4,026)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		89
Issuance of common stock pursuant to employee stock purchase plan	$ 4,586	$ 1	4,585
Ending balance (in shares) at Apr. 30, 2024	39,754	39,754
Ending balance at Apr. 30, 2024	$ 1,460,521	$ 397	$ 334,596	$ 1,157,047	$ (31,519)