Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Outstanding shares, beginning balance (in shares) at Jul. 31, 2020		235,315,337
Stockholders' equity, beginning balance at Jul. 31, 2020	$ 2,489,516	$ 24	$ 672,727	$ (121,088)	$ 1,937,853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	200,285				200,285
Currency translation adjustment	(7,406)			(7,406)
Exercise of stock options, net of repurchased shares (in shares)		802,670
Exercise of stock options, net of repurchased shares	19,525		20,014		(489)
Stock-based compensation	8,913		8,913
Outstanding shares, ending balance (in shares) at Oct. 31, 2020		236,118,007
Stockholders' equity, ending balance at Oct. 31, 2020	2,710,833	$ 24	701,654	(128,494)	2,137,649
Outstanding shares, beginning balance (in shares) at Jul. 31, 2020		235,315,337
Stockholders' equity, beginning balance at Jul. 31, 2020	2,489,516	$ 24	672,727	(121,088)	1,937,853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	680,521
Outstanding shares, ending balance (in shares) at Apr. 30, 2021		236,568,394
Stockholders' equity, ending balance at Apr. 30, 2021	3,249,377	$ 24	733,581	(101,664)	2,617,436
Outstanding shares, beginning balance (in shares) at Oct. 31, 2020		236,118,007
Stockholders' equity, beginning balance at Oct. 31, 2020	2,710,833	$ 24	701,654	(128,494)	2,137,649
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	193,440				193,440
Currency translation adjustment	21,774			21,774
Exercise of stock options, net of repurchased shares (in shares)		121,158
Exercise of stock options, net of repurchased shares	2,800		3,098		(298)
Stock-based compensation	8,865		8,865
Shares issued for Employee Stock Purchase Plan (in shares)		67,877
Shares issued for Employee Stock Purchase Plan	4,880		4,880
Outstanding shares, ending balance (in shares) at Jan. 31, 2021		236,307,042
Stockholders' equity, ending balance at Jan. 31, 2021	2,942,592	$ 24	718,497	(106,720)	2,330,791
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	286,796				286,796
Currency translation adjustment	5,056			5,056
Exercise of stock options, net of repurchased shares (in shares)		261,352
Exercise of stock options, net of repurchased shares	5,566		5,717		(151)
Stock-based compensation	9,367		9,367
Outstanding shares, ending balance (in shares) at Apr. 30, 2021		236,568,394
Stockholders' equity, ending balance at Apr. 30, 2021	3,249,377	$ 24	733,581	(101,664)	2,617,436
Outstanding shares, beginning balance (in shares) at Jul. 31, 2021		237,014,273
Stockholders' equity, beginning balance at Jul. 31, 2021	3,529,201	$ 24	761,834	(100,860)	2,868,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	260,363				260,363
Currency translation adjustment	(10,518)			(10,518)
Exercise of stock options, net of repurchased shares (in shares)		145,986
Exercise of stock options, net of repurchased shares	5,323		5,572		(249)
Stock-based compensation (in shares)		21,091
Stock-based compensation	9,452		9,452
Outstanding shares, ending balance (in shares) at Oct. 31, 2021		237,181,350
Stockholders' equity, ending balance at Oct. 31, 2021	3,793,821	$ 24	776,858	(111,378)	3,128,317
Outstanding shares, beginning balance (in shares) at Jul. 31, 2021		237,014,273
Stockholders' equity, beginning balance at Jul. 31, 2021	3,529,201	$ 24	761,834	(100,860)	2,868,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 826,395
Exercise of stock options, net of repurchased shares (in shares)	525,000
Outstanding shares, ending balance (in shares) at Apr. 30, 2022		237,613,616
Stockholders' equity, ending balance at Apr. 30, 2022	$ 4,353,054	$ 24	811,900	(152,596)	3,693,726
Outstanding shares, beginning balance (in shares) at Oct. 31, 2021		237,181,350
Stockholders' equity, beginning balance at Oct. 31, 2021	3,793,821	$ 24	776,858	(111,378)	3,128,317
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	287,412				287,412
Currency translation adjustment	(12,124)			(12,124)
Exercise of stock options, net of repurchased shares (in shares)		246,451
Exercise of stock options, net of repurchased shares	6,063		6,413		(350)
Stock-based compensation (in shares)		2,767
Stock-based compensation	9,662		9,662
Shares issued for Employee Stock Purchase Plan (in shares)		43,924
Shares issued for Employee Stock Purchase Plan	5,022		5,022
Outstanding shares, ending balance (in shares) at Jan. 31, 2022		237,474,492
Stockholders' equity, ending balance at Jan. 31, 2022	4,089,856	$ 24	797,955	(123,502)	3,415,379
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	278,620				278,620
Currency translation adjustment	(29,094)			(29,094)
Exercise of stock options, net of repurchased shares (in shares)		132,955
Exercise of stock options, net of repurchased shares	3,850		4,123		(273)
Stock-based compensation (in shares)		6,136
Stock-based compensation	9,818		9,818
Shares issued for Employee Stock Purchase Plan (in shares)		33
Shares issued for Employee Stock Purchase Plan	4		4
Outstanding shares, ending balance (in shares) at Apr. 30, 2022		237,613,616
Stockholders' equity, ending balance at Apr. 30, 2022	$ 4,353,054	$ 24	$ 811,900	$ (152,596)	$ 3,693,726