Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Schedule Of Inventories

Inventories consist of the following (in thousands):

	September 30,
	2014		2013
Finished goods	$	18,046	$	13,509
Raw materials	6,425		5,517
	$	24,471	$	19,026

Schedule Of Property And Equipment

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

	September 30,
	2014			2013
Computer equipment	$	113,290		$	93,326
Office furniture and equipment	14,325			13,391
Leasehold improvements	57,976			54,972
	185,591			161,689
Accumulated depreciation and amortization	(118,800		)	(98,167		)
	$	66,791		$	63,522

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,
	2014		2013		2012
Risk-free interest rate	0.05	%	0.06	%	0.14	%
Expected dividend	—		—		—
Expected term	0.5 years		0.5 years		0.5 years
Expected volatility	24.44	%	42.92	%	45.20	%

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,
	2014		2013		2012
Numerator
Net income	$	311,183	$	277,314	$	275,186
Denominator
Weighted average shares outstanding — basic	75,395		78,565		79,135
Dilutive effect of common shares from stock options and restricted stock units	697		571		645
Weighted average shares outstanding — diluted	76,092		79,136		79,780
Basic net income per share	$	4.13	$	3.53	$	3.48
Diluted net income per share	$	4.09	$	3.50	$	3.45