Goodwill and other Identifiable Intangible Assets (Tables)

9 Months Ended

Jun. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets were (in thousands):

	June 30, 2013							September 30, 2012
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	46,248	$	(44,193	)	$	2,055	$	46,597	$	(43,639	)	$	2,958
License agreements	2,840		(2,737		)	103		2,840		(2,682		)	158
Patents and trademarks	11,924		(9,302		)	2,622		10,943		(8,469		)	2,474
Customer maintenance contracts	700		(700		)	—		700		(700		)	—
Customer relationships	18,699		(13,531		)	5,168		17,504		(12,465		)	5,039
Non-compete agreements	2,131		(1,178		)	953		1,045		(1,045		)	—
Order backlog	360		(240		)	120		—		—			—
Total	$	82,902	$	(71,881	)	$	11,021	$	79,629	$	(69,000	)	$	10,629

Schedule of Estimated Amortization Expense Related to Identifiable Intangible Assets

Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2013 and the five succeeding fiscal years is (in thousands):

2013 (three months)	$	1,093
2014	3,809
2015	2,805
2016	1,466
2017	706
2018	482

Schedule of Changes in Carrying Amount of Goodwill

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

	Nine months ended June 30,
	2013			2012
Beginning balance, October 1	$	86,209		$	86,012
Acquisition of Etherios, Inc.	17,120			—
Foreign currency translation adjustment	(718		)	(468		)
Ending balance, June 30	$	102,611		$	85,544