Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and acquired intangible assets consisted of the following:



	September 30, 2017						September 30, 2016
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
	(in thousands)
Goodwill (not amortized)					$	1,182,772					$	1,169,813
Intangible assets with finite lives (amortized) (1):
Purchased software	$	362,955	$	228,377	$	134,578	$	354,595	$	199,192	$	155,403
Capitalized software	22,877		22,877		—		22,877		22,877		—
Customer lists and relationships	359,932		241,554		118,378		355,698		206,515		149,183
Trademarks and trade names	19,138		14,186		4,952		19,007		13,323		5,684
Other	4,030		4,030		—		3,955		3,920		35
	$	768,932	$	511,024	$	257,908	$	756,132	$	445,827	$	310,305
Total goodwill and acquired intangible assets					$	1,440,680					$	1,480,118

(1) The weighted average useful lives of purchased software, customer lists and relationships, and trademarks and trade names with a remaining net book value are 9 years, 10 years, and 10 years, respectively.

Schedule Of Movements in Goodwill by Reportable Segment

Changes in goodwill presented by reportable segment were as follows:



	Software Products Segment		Services Segment			Total
	(in thousands)
Balance, September 30, 2015	$	1,016,413	$	52,628		$	1,069,041
Acquisition of Vuforia	23,316		—			23,316
Acquisition of Kepware	77,081		—			77,081
Foreign currency translation adjustments	228		(6		)	222
Balance, July 2, 2016 prior to reallocation	$	1,117,038	$	52,622		$	1,169,660
	Solutions Group		IoT Group			Professional Services		Total
	(in thousands)
Balance, July 2, 2016 after reallocation	$	1,050,013	$	90,053		$	29,594	$	1,169,660
Foreign currency translation adjustments	137		12			4		153
Balance, September 30, 2016	$	1,050,150	$	90,065		$	29,598	$	1,169,813
Acquisition	2,847		—			—		2,847
Foreign currency translation adjustments	9,077		778			257		10,112
Balance, September 30, 2017	$	1,062,074	$	90,843		$	29,855	$	1,182,772

Amortization Of Intangible Assets

The aggregate amortization expense for intangible assets with finite lives recorded for the years ended September 30, 2017, 2016 and 2015 was reflected in our Consolidated Statements of Operations as follows:



	Year ended September 30,
	2017		2016		2015
	(in thousands)
Amortization of acquired intangible assets	$	32,108	$	33,198	$	36,129
Cost of software revenue	26,621		24,604		19,402
Total amortization expense	$	58,729	$	57,802	$	55,531