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Goodwill and Intangible Assets
6 Months Ended
Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
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 March 31,
 
Six Months Ended March 31,
 
2016
 
2015
 
2016
 
2015
 
(In thousands)
Cost of revenues
$
1,840

 
$
1,901

 
$
3,747

 
$
3,737

Selling, general and administrative expenses
1,667

 
1,614

 
3,340

 
2,710

 
$
3,507

 
$
3,515

 
$
7,087

 
$
6,447



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 $152.7 million and $154.2 million as of March 31, 2016 and September 30, 2015, respectively.

Estimated future intangible asset amortization expense associated with intangible assets existing at March 31, 2016, was as follows (in thousands):
Year Ended September 30,
 
2016 (excluding the six months ended March 31, 2016)
$
6,861

2017
12,857

2018
5,996

2019
5,480

2020
3,360

Thereafter
5,026


$
39,580


The following table summarizes changes to goodwill during the six months ended March 31, 2016, both in total and as allocated to our segments:
 
Applications
 
Scores
 
Tools
 
Total
 
(In thousands)
Balance at September 30, 2015
$
596,765

 
$
146,648

 
$
71,337

 
$
814,750

Adjustment related to prior acquisitions
283

 

 

 
283

Foreign currency translation adjustment
(5,953
)
 

 
(788
)
 
(6,741
)
Balance at March 31, 2016
$
591,095

 
$
146,648

 
$
70,549

 
$
808,292