Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive 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	61,202			61,202
Foreign currency translation adjustments	(8,233)				(8,233)
Other comprehensive income, net of tax	1,962				1,962
Repurchase and retirement of common stock (in shares)		(85)
Repurchase and retirement of common stock	(3,855)	$ (1)	(3,854)
Equity-based compensation	1,958		1,958
Exercise of stock options (in shares)		44
Exercise of stock options	863	$ 1	862
Vesting of restricted stock units (in shares)		8
Tax withholding related to net share settlements of equity awards	(256)		(256)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		43
Issuance of common stock pursuant to employee stock purchase plan	1,140		1,140
Ending balance (in shares) at Jul. 31, 2021		43,083
Ending balance at Jul. 31, 2021	$ 877,243	$ 431	542,587	335,737	(1,512)
Beginning balance (in shares) at Apr. 30, 2022	42,773	42,773
Beginning balance at Apr. 30, 2022	$ 1,064,498	$ 428	522,136	547,977	(6,043)
Increase (Decrease) in Stockholders' Equity
Net income	89,470			89,470
Foreign currency translation adjustments	2,642				2,642
Other comprehensive income, net of tax	2,219				2,219
Repurchase and retirement of common stock (in shares)		(516)
Repurchase and retirement of common stock	(23,795)	$ (5)	(23,790)
Equity-based compensation	3,132		3,132
Exercise of stock options (in shares)		1
Exercise of stock options	29		29
Vesting of restricted stock units (in shares)		7
Tax withholding related to net share settlements of equity awards	(300)		(300)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		33
Issuance of common stock pursuant to employee stock purchase plan	$ 1,329		1,329
Ending balance (in shares) at Jul. 31, 2022	42,298	42,298
Ending balance at Jul. 31, 2022	$ 1,139,224	$ 423	$ 502,536	$ 637,447	$ (1,182)