Income Taxes (Tables)

12 Months Ended

Sep. 30, 2013

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,
	2013		2012		2011
United States	$	431,833	$	421,346	$	342,741
International	6,259		10,868		18,010
	$	438,092	$	432,214	$	360,751

Schedule Of Provision For Income Taxes (Benefit)

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

	Years Ended September 30,
	2013			2012			2011
Current
U.S. federal	$	138,372		$	147,774		$	103,620
State	14,322			10,733			7,397
Foreign	6,633			4,218			5,743
Total	159,327			162,725			116,760
Deferred
U.S. federal	1,310			(7,320		)	3,070
State	(203		)	187			(144		)
Foreign	344			1,436			(332		)
Total	1,451			(5,697		)	2,594
	$	160,778		$	157,028		$	119,354

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,
	2013			2012			2011
Income tax provision at statutory rate	$	153,332		$	151,275		$	126,263
State taxes, net of federal benefit	10,944			8,733			5,365
Foreign operations	4,786			1,850			(971		)
Research and development and other credits	(10,649		)	(3,537		)	(11,860		)
Domestic manufacturing deduction	(14,047		)	(12,539		)	(9,351		)
Stock-based and other compensation	15,286			10,501			9,388
Other	1,126			745			520
	$	160,778		$	157,028		$	119,354

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,
	2013			2012
Deferred tax assets
Net operating loss carry-forwards	$	10,072		$	1,366
Allowance for doubtful accounts	1,112			1,106
Accrued compensation and benefits	7,272			6,371
Inventories and related reserves	1,120			1,223
Stock-based compensation	5,933			11,713
Deferred revenue	26,277			23,372
Other accruals and reserves	10,131			9,594
Tax credit carry-forwards	2,122			793
	64,039			55,538
Valuation allowance	(5,390		)	(208		)
	58,649			55,330
Deferred tax liabilities
Purchased intangibles and other	(21,567		)	(6,329		)
Depreciation	(3,697		)	(3,161		)
	(25,264		)	(9,490		)
Net deferred tax assets	$	33,385		$	45,840

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 2013, 2012 and 2011:

	2013			2012			2011
Balance, beginning of period	$	5,452		$	5,952		$	6,568
Gross increases (decreases) related to prior period tax positions	1,089			(201		)	1,198
Gross increases related to current period tax positions	1,957			702			1,659
Decreases relating to settlements with tax authorities	—			(3		)	(243		)
Reductions due to lapses of statute of limitations	(1,196		)	(998		)	(3,230		)
Balance, end of period	$	7,302		$	5,452		$	5,952