Goodwill and Intangible Assets (Tables)

6 Months Ended

Mar. 28, 2020

Goodwill and acquired intangible assets consisted of the following:



(in thousands)	March 28, 2020						September 30, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill (not amortized)					$	1,603,081					$	1,238,179
Intangible assets with finite lives (amortized):
Purchased software	$	427,092	$	292,756	$	134,336	$	377,359	$	278,144	$	99,215
Capitalized software	22,877		22,877		—		22,877		22,877		—
Customer lists and relationships	413,054		303,095		109,959		355,931		288,828		67,103
Trademarks and trade names	22,524		15,628		6,896		18,891		15,260		3,631
Other	3,942		3,942		—		3,910		3,910		—
	$	889,489	$	638,298	$	251,191	$	778,968	$	609,019	$	169,949
Total goodwill and acquired intangible assets					$	1,854,272					$	1,408,128

Changes in goodwill presented by reportable segments were as follows:



(in thousands)	Software Products			Professional Services		Total
Balance, October 1, 2019	$	1,196,064		$	42,115	$	1,238,179
Onshape acquisition	364,910			—		364,910
Foreign currency translation adjustment	(8		)	—		(8		)
Balance, March 28, 2020	$	1,560,966		$	42,115	$	1,603,081

The aggregate amortization expense for intangible assets with finite lives was classified in our Consolidated Statements of Operations as follows:



(in thousands)	Three months ended				Six months ended
	March 28, 2020		March 30, 2019		March 28, 2020		March 30, 2019
Amortization of acquired intangible assets	$	7,288	$	5,930	$	14,065	$	11,866
Cost of license revenue	6,879		6,842		13,678		13,559
Total amortization expense	$	14,167	$	12,772	$	27,743	$	25,425