Income Taxes (Tables)

12 Months Ended

Sep. 30, 2014

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,
	2014		2013		2012
United States	$	492,577	$	431,833	$	421,346
International	4,765		6,259		10,868
	$	497,342	$	438,092	$	432,214

Schedule Of Provision For Income Taxes (Benefit)

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

	Years Ended September 30,
	2014			2013			2012
Current
U.S. federal	$	164,994		$	138,372		$	147,774
State	15,462			14,322			10,733
Foreign	13,287			6,633			4,218
Total	193,743			159,327			162,725
Deferred
U.S. federal	(5,778		)	1,310			(7,320		)
State	(83		)	(203		)	187
Foreign	(1,723		)	344			1,436
Total	(7,584		)	1,451			(5,697		)
	$	186,159		$	160,778		$	157,028

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,
	2014			2013			2012
Income tax provision at statutory rate	$	174,070		$	153,332		$	151,275
State taxes, net of federal benefit	12,901			10,944			8,733
Foreign operations	5,050			4,786			1,850
Research and development and other credits	(6,397		)	(10,649		)	(3,537		)
Domestic manufacturing deduction	(15,514		)	(14,047		)	(12,539		)
Stock-based and other compensation	14,583			15,286			10,501
Other	1,466			1,126			745
	$	186,159		$	160,778		$	157,028

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,
	2014			2013
Deferred tax assets
Net operating loss carry-forwards	$	8,245		$	10,072
Allowance for doubtful accounts	1,724			1,112
Accrued compensation and benefits	8,273			7,272
Inventories and related reserves	1,139			1,120
Stock-based compensation	7,295			5,933
Deferred revenue	30,662			26,277
Other accruals and reserves	13,473			10,131
Tax credit carryforwards	2,852			2,122
Depreciation	738			—
	74,401			64,039
Valuation allowance	(7,198		)	(5,390		)
	67,203			58,649
Deferred tax liabilities
Purchased intangibles and other	(24,108		)	(21,567		)
Depreciation	—			(3,697		)
	(24,108		)	(25,264		)
Net deferred tax assets	$	43,095		$	33,385

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 2014, 2013 and 2012:

	2014			2013			2012
Balance, beginning of period	$	7,302		$	5,452		$	5,952
Gross increases related to prior period tax positions	901			1,231			79
Gross decreases related to prior period tax positions	(224		)	(142		)	(280		)
Gross increases related to current period tax positions	1,081			1,957			702
Decreases relating to settlements with tax authorities	(2,589		)	—			(3		)
Reductions due to lapses of statute of limitations	(77		)	(1,196		)	(998		)
Balance, end of period	$	6,394		$	7,302		$	5,452