Goodwill and Intangible Assets (Tables)

9 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table outlines changes to the carrying amount of goodwill (in thousands):

	Goodwill
Balance at September 30, 2016	$	309,616
Translation adjustments	295
Balance at June 30, 2017	$	309,911

Schedule of Finite-Lived Intangible Assets

Intangible assets subject to amortization consist of the following (in thousands):

	June 30, 2017							September 30, 2016
Intangible Assets, Net	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Acquired patents and technology	$	299,274	$	(122,393	)	$	176,881	$	293,824	$	(101,711	)	$	192,113
Customer relationships	56,828		(37,691		)	19,137		56,821		(34,113		)	22,708
Other intangibles	22,724		(22,248		)	476		22,716		(22,195		)	521
Total	$	378,826	$	(182,332	)	$	196,494	$	373,361	$	(158,019	)	$	215,342

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

As of June 30, 2017, estimated amortization expense in future fiscal periods was as follows (in thousands):

Fiscal Year	Amortization Expense
Remainder of 2017	$	7,303
2018	25,485
2019	24,811
2020	24,348
2021	24,321
Thereafter	90,226
Total	$	196,494