Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and acquired intangible assets consisted of the following:



(in thousands)	September 30, 2019						September 30, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill (not amortized)					$	1,238,179					$	1,182,457
Intangible assets with finite lives (amortized) (1):
Purchased software	$	377,359	$	278,144	$	99,215	$	362,679	$	254,059	$	108,620
Capitalized software	22,877		22,877		—		22,877		22,877		—
Customer lists and relationships	355,931		288,828		67,103		357,586		270,272		87,314
Trademarks and trade names	18,891		15,260		3,631		19,054		14,786		4,268
Other	3,910		3,910		—		4,003		4,003		—
	$	778,968	$	609,019	$	169,949	$	766,199	$	565,997	$	200,202
Total goodwill and acquired intangible assets					$	1,408,128					$	1,382,659

(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 11 years, respectively.

Schedule Of Movements in Goodwill by Reportable Segment

Changes in goodwill presented by reportable segment were as follows:



(in thousands)	Software Products			Professional Services			Total
Balance, September 30, 2017	$	1,152,917		$	29,855		$	1,182,772
Acquisition	4,350			—			4,350
Foreign currency translation adjustments	(4,547		)	(118		)	(4,665		)
Balance, September 30, 2018	$	1,152,720		$	29,737		$	1,182,457
Frustum acquisition	53,673			—			53,673
Other acquisitions	—			12,645			12,645
Foreign currency translation adjustments	(10,329		)	(267		)	(10,596		)
Balance, September 30, 2019	$	1,196,064		$	42,115		$	1,238,179

Amortization Of Intangible Assets

The aggregate amortization expense for intangible assets with finite lives recorded for the years ended September 30, 2019, 2018 and 2017 was reflected in our Consolidated Statements of Operations as follows:



(in thousands)	Year ended September 30,
	2019		2018		2017
Amortization of acquired intangible assets	$	23,841	$	31,350	$	32,108
Cost of software revenue	27,307		26,706		26,621
Total amortization expense	$	51,148	$	58,056	$	58,729