Stockholders' Equity (Narrative) (Details) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Oct. 31, 2017 USD ($)	Nov. 30, 2017 USD ($) shares	Jun. 30, 2023 USD ($) offering $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 shares	Feb. 21, 2014 shares	Apr. 30, 1997 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to be repurchased under repurchase program (in shares)							20,000,000
Total number of shares repurchased pursuant to the repurchase program (in shares)			41,836,234	41,836,234
Additional shares that can be repurchased under the approved share repurchase program (in shares)			12,900,000
Preferred stock, shares authorized (in shares)			2,000,000	2,000,000				2,000,000
Preferred stock at par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01				$ 0.01
Preferred stock, shares outstanding (in shares)			0
Preferred stock, shares issued (in shares)			0	0
Expiration period			7 years
Reduction in the number of shares of common stock available for issuance (in shares)			2.8
Number of shares given for each share of common stock delivered in settlement of all other awards (in shares)			1
Maximum number of shares subject to awards granted (in shares)			3,000,000
Number of common stock shares granted in participant's initial year of hiring (in shares)			4,500,000
Fair value of RSUs and PRSUs | $			$ 66,800	$ 65,500	$ 59,600
Aggregate intrinsic value of the options exercised | $			25,400	$ 33,700	$ 8,900
Aggregate intrinsic value of the stock-based compensation arrangements outstanding | $			76,800
Aggregate intrinsic value of the stock-based compensation arrangements exercisable | $			76,600
Aggregate intrinsic value of the stock-based compensation arrangements exercisable, vested and expected to vest | $			$ 76,800
Shares issued under Employee Stock Purchase Plan (in shares)			220,000	216,000	229,000
Stock-based compensation expense | $			$ 71,142	$ 65,257	$ 63,927
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $			$ 133,500
Expected weighted average period of unrecognized compensation costs related to unvested stock-based compensation arrangements			2 years 7 months 6 days
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares repurchased pursuant to the repurchase program (in shares)			41,836,000	41,836,000	41,836,000	41,836,000
Total cost of shares repurchased pursuant to the repurchase program | $			$ 1,600,000
2009 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance and pending registration (in shares)		7,400,000
Extended period		4 years
Common stock authorized for issuance (in shares)			51,100,000
Common stock reserved for future issuance (in shares)			14,400,000
Amended And Restated 2009 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount payable pursuant to cash denominated performance awards granted | $	$ 3,000	$ 5,000
Amended And Restated 2009 Plan | Non Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum award amount with other cash fees earned for services | $		700
Amended And Restated 2009 Plan | Board Of Directors Chairman
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum award amount with other cash fees earned for services | $		$ 1,200
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)			1,300,000
Percentage of purchase price of common stock lower than the fair market value of common stock on the date of grant			85.00%
Percentage of purchase price of common stock lower than the fair market value of common stock on the date of purchase			85.00%
Number of offerings | offering			2
Stock-based compensation expense | $			$ 11,500	$ 11,000	$ 10,900
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Minimum | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase program offering period			3 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Maximum | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase program offering period			27 months
Common stock shares subscribed | $			$ 25
Performance Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Performance Restricted Stock Units (PRSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			200.00%
Performance Restricted Stock Units (PRSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			225.00%