Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and acquired intangible assets consisted of the following:



	September 30, 2018						September 30, 2017
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
	(in thousands)
Goodwill (not amortized)					$	1,182,457					$	1,182,772
Intangible assets with finite lives (amortized) (1):
Purchased software	$	362,679	$	254,059	$	108,620	$	362,955	$	228,377	$	134,578
Capitalized software	22,877		22,877		—		22,877		22,877		—
Customer lists and relationships	357,586		270,272		87,314		359,932		241,554		118,378
Trademarks and trade names	19,054		14,786		4,268		19,138		14,186		4,952
Other	4,003		4,003		—		4,030		4,030		—
	$	766,199	$	565,997	$	200,202	$	768,932	$	511,024	$	257,908
Total goodwill and acquired intangible assets					$	1,382,659					$	1,440,680

(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:



	Software Products			Professional Services			Total
	(in thousands)
Balance, September 30, 2016	$	1,140,215		$	29,598		$	1,169,813
Acquisition	2,847			—			2,847
Foreign currency translation adjustments	9,855			257			10,112
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

Amortization Of Intangible Assets

The aggregate amortization expense for intangible assets with finite lives recorded for the years ended September 30, 2018, 2017 and 2016 was reflected in our Consolidated Statements of Operations as follows:



	Year ended September 30,
	2018		2017		2016
	(in thousands)
Amortization of acquired intangible assets	$	31,350	$	32,108	$	33,198
Cost of software revenue	26,706		26,621		24,604
Total amortization expense	$	58,056	$	58,729	$	57,802