Goodwill and Other Identifiable Intangible Assets, Net (Tables)

3 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets were (in thousands):



	December 31, 2017							September 30, 2017
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	55,296	$	(46,841	)	$	8,455	$	51,292	$	(46,304	)	$	4,988
License agreements	18		(17		)	1		18		(17		)	1
Patents and trademarks	14,553		(11,505		)	3,048		12,484		(11,280		)	1,204
Customer relationships	40,230		(17,745		)	22,485		21,914		(16,817		)	5,097
Non-compete agreements	600		(120		)	480		600		(90		)	510
Total	$	110,697	$	(76,228	)	$	34,469	$	86,308	$	(74,508	)	$	11,800

Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets

Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2018 and the five succeeding fiscal years is (in thousands):



2018 (nine months)	$	4,770
2019	6,167
2020	5,856
2021	5,311
2022	5,028
2023	3,622

Schedule of Changes in Carrying Amount of Goodwill

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



	Three months ended December 31,
	2017			2016
Beginning balance, October 1	$	131,995		$	109,448
Acquisitions	17,341			2,737
Foreign currency translation adjustment	(3		)	(1,069		)
Ending balance, December 31	$	149,333		$	111,116