Goodwill and Other Identifiable Intangible Assets, Net (Tables)

9 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets were (in thousands):

	June 30, 2017							September 30, 2016
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	51,017	$	(45,757	)	$	5,260	$	46,594	$	(44,999	)	$	1,595
License agreements	144		(15		)	129		18		(10		)	8
Patents and trademarks	12,410		(11,133		)	1,277		11,619		(10,871		)	748
Customer relationships	21,735		(16,412		)	5,323		17,463		(15,773		)	1,690
Non-compete agreements	600		(60		)	540		—		—			—
Total	$	85,906	$	(73,377	)	$	12,529	$	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 (three months)	$	714
2018	2,831
2019	2,733
2020	1,822
2021	1,543
2022	1,369

Schedule of Changes in Carrying Amount of Goodwill

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

	Nine months ended June 30,
	2017		2016
Beginning balance, October 1	$	109,448	$	100,183
Acquisitions	21,434		10,985
Foreign currency translation adjustment	187		(1,288		)
Ending balance, June 30	$	131,069	$	109,880