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 (loss), 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, 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	196,946
Foreign currency translation adjustments	(19,304)
Other comprehensive income (loss), net of tax	9,274
Ending balance (in shares) at Jan. 31, 2022		43,095
Ending balance at Jan. 31, 2022	1,003,276	$ 431	536,635	471,481	(5,271)
Beginning balance (in shares) at Jul. 31, 2021		43,083
Beginning balance at Jul. 31, 2021	877,243	$ 431	542,587	335,737	(1,512)
Increase (Decrease) in Stockholders' Equity
Net income	74,361			74,361
Foreign currency translation adjustments	4,114				4,114
Other comprehensive income (loss), net of tax	3,289				3,289
Repurchase and retirement of common stock (in shares)		(195)
Repurchase and retirement of common stock	(9,269)	$ (2)	(9,267)
Equity-based compensation	3,215		3,215
Exercise of stock options (in shares)		52
Exercise of stock options	977	$ 1	976
Vesting of restricted stock units (in shares)		112
Vesting of restricted stock units	0	$ 1	(1)
Tax withholding related to net share settlements of equity awards	(2,579)		(2,579)
Ending balance (in shares) at Oct. 31, 2021		43,052
Ending balance at Oct. 31, 2021	951,351	$ 431	534,931	410,098	5,891
Increase (Decrease) in Stockholders' Equity
Net income	61,383			61,383
Foreign currency translation adjustments	(15,185)				(15,185)
Other comprehensive income (loss), net of tax	4,023				4,023
Repurchase and retirement of common stock (in shares)		(87)
Repurchase and retirement of common stock	(4,734)	$ (1)	(4,733)
Equity-based compensation	3,077		3,077
Exercise of stock options (in shares)		101
Exercise of stock options	2,184	$ 1	2,183
Vesting of restricted stock units (in shares)		2
Tax withholding related to net share settlements of equity awards	(15)		(15)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		27
Issuance of common stock pursuant to employee stock purchase plan	1,192		1,192
Ending balance (in shares) at Jan. 31, 2022		43,095
Ending balance at Jan. 31, 2022	$ 1,003,276	$ 431	536,635	471,481	(5,271)
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 (loss), 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
Ending balance at Jul. 31, 2022	$ 1,139,224	$ 423	502,536	637,447	(1,182)
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	257,398
Foreign currency translation adjustments	(21,728)
Other comprehensive income (loss), net of tax	$ 1,469
Ending balance (in shares) at Jan. 31, 2023	41,347	41,347
Ending balance at Jan. 31, 2023	$ 1,230,696	$ 413	451,210	805,375	(26,302)
Beginning balance (in shares) at Jul. 31, 2022		42,298
Beginning balance at Jul. 31, 2022	1,139,224	$ 423	502,536	637,447	(1,182)
Increase (Decrease) in Stockholders' Equity
Net income	103,153			103,153
Foreign currency translation adjustments	(34,585)				(34,585)
Other comprehensive income (loss), net of tax	1,130				1,130
Repurchase and retirement of common stock (in shares)		(601)
Repurchase and retirement of common stock	(25,776)	$ (6)	(25,770)
Equity-based compensation	3,781		3,781
Exercise of stock options (in shares)		53
Exercise of stock options	672		672
Vesting of restricted stock units (in shares)		101
Vesting of restricted stock units	0	$ 1	(1)
Tax withholding related to net share settlements of equity awards	(3,660)		(3,660)
Ending balance (in shares) at Oct. 31, 2022		41,851
Ending balance at Oct. 31, 2022	1,183,939	$ 418	477,558	740,600	(34,637)
Increase (Decrease) in Stockholders' Equity
Net income	64,775			64,775
Foreign currency translation adjustments	10,215				10,215
Other comprehensive income (loss), net of tax	(1,880)				(1,880)
Repurchase and retirement of common stock (in shares)		(656)
Repurchase and retirement of common stock	(33,196)	$ (6)	(33,190)
Equity-based compensation	3,285		3,285
Exercise of stock options (in shares)		104
Exercise of stock options	1,729	$ 1	1,728
Vesting of restricted stock units (in shares)		2
Tax withholding related to net share settlements of equity awards	(45)		(45)
Issuance of common stock pursuant to employee stock purchase plan (in shares)		46
Issuance of common stock pursuant to employee stock purchase plan	$ 1,874		1,874
Ending balance (in shares) at Jan. 31, 2023	41,347	41,347
Ending balance at Jan. 31, 2023	$ 1,230,696	$ 413	$ 451,210	$ 805,375	$ (26,302)