Goodwill and Intangible Assets

Amortization expense associated with our intangible assets, which has been reflected as a separate operating expense caption within the accompanying condensed consolidated statements of income and comprehensive income, consisted of the following:



	Quarter Ended December 31,
	2018		2017
	(In thousands)
Cost of revenues	$	494	$	706
Selling, general and administrative expenses	1,008		1,082
Total	$	1,502	$	1,788

Cost of revenues reflects our amortization of completed technology and selling, general and administrative expenses reflects our amortization of other intangible assets. Intangible assets, gross were $110.2 million and $111.0 million as of December 31, 2018 and September 30, 2018, respectively.

Estimated future intangible asset amortization expense associated with intangible assets existing at December 31, 2018 was as follows (in thousands):



Year Ending September 30,
2019 (excluding the quarter ended December 31, 2018)	$	4,427
2020	3,618
2021	2,396
2022	2,252
2023	217
	$	12,910

The following table summarizes changes to goodwill during the quarter ended December 31, 2018, both in total and as allocated to our segments:



	Applications			Scores		Decision Management Software			Total
	(In thousands)
Balance at September 30, 2018	$	585,161		$	146,648	$	69,081		$	800,890
Addition from acquisitions	980			—		—			980
Foreign currency translation adjustment	(2,820		)	—		(257		)	(3,077		)
Balance at December 31, 2018	$	583,321		$	146,648	$	68,824		$	798,793