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Income Taxes (Tables)

12 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Components Of Income Before Income Taxes

The United States and international components of income before income taxes are as follows (in thousands):

						Years Ended September 30,
						2023						2022						2021
United States						$	268,314					$	217,323					$	189,398
International						217,674						168,070						197,539
						$	485,988					$	385,393					$	386,937

Schedule Of Provision For Income Taxes (Benefit)

The provision for income taxes consists of the following (in thousands):

						Years Ended September 30,
						2023						2022						2021
Current
U.S. federal						$	115,170					$	35,259					$	53,107
State						18,359						14,592						16,686
Foreign						66,053						54,079						62,832
Total						199,582						103,930						132,625
Deferred
U.S. federal						(89,280)						(28,721)						(61,739)
State						(18,576)						(11,332)						(15,294)
Foreign						(686)						(644)						104
Total						(108,542)						(40,697)						(76,929)
						$	91,040					$	63,233					$	55,696

Schedule Of Effective Tax Rate Differs From The U.S. Federal Statutory Rate

The effective tax rate differs from the U.S. federal statutory rate as follows (in thousands):

						Years Ended September 30,
						2023						2022						2021
Income tax provision at statutory rate						$	102,058					$	80,933					$	81,257
State taxes, net of federal benefit						6,806						6,012						5,118
Tax impact of foreign operations						(20,230)						(21,435)						(26,881)
Research and development and other credits						(19,198)						(18,917)						(18,055)
Stock-based and other compensation						20,145						15,070						12,740
Other						1,459						1,570						1,517
						$	91,040					$	63,233					$	55,696

Schedule Of Tax Effects To Deferred Tax Assets And Liabilities

The tax effects of the temporary differences that give rise to the deferred tax assets and liabilities are as follows (in thousands):

						Years Ended September 30,
						2023						2022
Deferred tax assets
Net operating loss carry-forwards						$	40,201					$	42,849
Capitalized research and development costs						267,744						158,206
Accrued compensation and benefits						11,995						14,068
Stock-based compensation						8,875						10,389
Deferred revenue						42,544						32,244
Lease liabilities						62,405						67,520
Other accruals and reserves						22,723						18,797
Tax credit carryforwards						23,883						28,858
Depreciation						531						505
						480,901						373,436
Valuation allowance						(43,942)						(46,136)
						436,959						327,300
Deferred tax liabilities
Purchased intangibles						(55,519)						(57,350)
Depreciation						(28,113)						(22,278)
Deferred costs						(11,031)						(12,987)
Lease assets						(41,709)						(45,948)
Other accruals and reserves						(9,916)						(8,153)
						(146,288)						(146,716)
Net deferred tax assets						$	290,671					$	180,584

Schedule Of Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits

The following table provides a reconciliation of the beginning and ending amount of unrecognized tax benefits in fiscal years 2023, 2022 and 2021 (in thousands):

						2023						2022						2021
Balance, beginning of period						$	66,840					$	70,814					$	51,767
Gross increases related to prior period tax positions						4,270						4,816						14,867
Gross decreases related to prior period tax positions						(70)						(10,538)						—
Gross increases related to current period tax positions						9,224						10,203						12,595
Decreases relating to settlements with tax authorities						(300)						—						(321)
Reductions due to lapses of statute of limitations						(797)						(8,455)						(8,094)
Balance, end of period						$	79,167					$	66,840					$	70,814

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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