Goodwill and Other Identifiable Intangible Assets, Net (Tables)

3 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets were (in thousands):



	December 31, 2016							September 30, 2016
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	46,558	$	(44,756	)	$	1,802	$	46,594	$	(44,999	)	$	1,595
License agreements	18		(12		)	6		18		(10		)	8
Patents and trademarks	11,537		(10,846		)	691		11,619		(10,871		)	748
Customer relationships	17,432		(15,632		)	1,800		17,463		(15,773		)	1,690
Total	$	75,545	$	(71,246	)	$	4,299	$	75,694	$	(71,653	)	$	4,041

Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets

Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2017 and the five succeeding fiscal years is (in thousands):



2017 (nine months)	$	1,131
2018	1,321
2019	958
2020	401
2021	232
2022	163

Schedule of Changes in Carrying Amount of Goodwill

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



	Three months ended December 31,
	2016			2015
Beginning balance, October 1	$	109,448		$	100,183
Acquisitions	2,737			11,020
Foreign currency translation adjustment	(1,069		)	(959		)
Ending balance, December 31	$	111,116		$	110,244