Goodwill and Other Identifiable Intangible Assets, Net (Tables)

9 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets were (in thousands):

	June 30, 2018							September 30, 2017
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	58,048	$	(47,983	)	$	10,065	$	51,292	$	(46,304	)	$	4,988
License agreements	102		(39		)	63		18		(17		)	1
Patents and trademarks	15,612		(11,965		)	3,647		12,484		(11,280		)	1,204
Customer relationships	46,569		(19,886		)	26,683		21,914		(16,817		)	5,097
Non-compete agreements	600		(180		)	420		600		(90		)	510
Order backlog	1,800		(900		)	900		—		—			—
Total	$	122,731	$	(80,953	)	$	41,778	$	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 (three months)	$	2,466
2019	8,356
2020	7,592
2021	7,126
2022	6,754
2023	4,751

Schedule of Changes in Carrying Amount of Goodwill

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

	Nine months ended June 30,
	2018			2017
Beginning balance, October 1	$	131,995		$	109,448
Acquisitions	23,485			21,206
Foreign currency translation adjustment	(915		)	(733		)
Ending balance, June 30	$	154,565		$	129,921