Goodwill and other Identifiable Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets, net as of September 30, 2013 and 2012 are comprised of the following (in thousands):

	September 30, 2013							September 30, 2012
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	45,960	$	(44,306	)	$	1,654	$	46,597	$	(43,639	)	$	2,958
License agreements	2,440		(2,440		)	—		2,840		(2,682		)	158
Patents and trademarks	11,322		(9,000		)	2,322		10,943		(8,469		)	2,474
Customer maintenance contracts	—		—			—		700		(700		)	—
Customer relationships	18,954		(14,130		)	4,824		17,504		(12,465		)	5,039
Non-compete agreements	1,100		(202		)	898		1,045		(1,045		)	—
Order backlog	360		(330		)	30		—		—			—
Total	$	80,136	$	(70,408	)	$	9,728	$	79,629	$	(69,000	)	$	10,629

Schedule of Amortization Expense

Amortization expense for fiscal years 2013, 2012 and 2011 is as follows (in thousands):

Fiscal year	Total
2013	$	4,416
2012	$	4,476
2011	$	6,171

Schedule of Estimated Amortization Expense Related to Identifiable Intangible Assets

Estimated amortization expense for the next five years is as follows (in thousands):

Fiscal year	Total
2014	$	3,619
2015	$	2,724
2016	$	1,540
2017	$	702
2018	$	482

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill were (in thousands):

	Fiscal years ended September 30,
	2013		2012
Beginning balance, October 1	$	86,209	$	86,012
Acquisition of Etherios, Inc.	17,282		—
Foreign currency translation adjustment	78		197
Ending balance, September 30	$	103,569	$	86,209