Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Schedule Of Inventories

Inventories consist of the following (in thousands):

	September 30,
	2013		2012
Finished goods	$	13,509	$	13,565
Raw materials	5,517		3,845
	$	19,026	$	17,410

Schedule Of Property And Equipment

Property and equipment consist of the following (in thousands):

	September 30,
	2013			2012
Computer equipment	$	93,326		$	95,987
Office furniture and equipment	13,391			12,335
Leasehold improvements	54,972			43,957
	161,689			152,279
Accumulated depreciation and amortization	(98,167		)	(92,675		)
	$	63,522		$	59,604

Schedule Of Assumptions In Determining The Fair Value Of Shares Issued Under The Employee Stock Purchase Plan

	Employee Stock Purchase Plan Years Ended September 30,
	2013		2012		2011
Risk-free interest rate	0.06	%	0.14	%	0.10	%
Expected dividend	—		—		—
Expected term	0.5 years		0.5 years		0.5 years
Expected volatility	42.92	%	45.20	%	53.87	%

Schedule Of Computation Of Basic And Diluted Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):

	Years Ended September 30,
	2013		2012		2011
Numerator
Net income	$	277,314	$	275,186	$	241,397
Denominator
Weighted average shares outstanding — basic	78,565		79,135		80,658
Dilutive effect of common shares from stock options and restricted stock units	571		645		824
Weighted average shares outstanding — diluted	79,136		79,780		81,482
Basic net income per share	$	3.53	$	3.48	$	2.99
Diluted net income per share	$	3.50	$	3.45	$	2.96