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Goodwill and Intangible Assets
9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets
Goodwill
The changes in the carrying amount of goodwill for the nine months ended September 30, 2017 are as follows (amounts in thousands):
 
Business
 
Consumer
 
Consolidated
Balance as of December 31, 2016
$
72,221

 
$
8,024

 
$
80,245

Adjustments to goodwill:
 
 
 
 
 
Foreign exchange adjustment
254

 
—

 
254

Balance as of September 30, 2017
$
72,475

 
$
8,024

 
$
80,499


Intangible Assets
Intangible assets are summarized as follows (amounts in thousands):
 
As of September 30, 2017
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying Amount
 
Weighted
Average
Amortization
Period
Amortizing intangible assets:
 
 
 
 
 
 
 
Technology
$
28,252

 
$
(22,290
)
 
$
5,962

 
5.3 years
Customer relationships
15,856

 
(9,966
)
 
5,890

 
8.0 years
Trade names
1,299

 
(1,290
)
 
9

 
2.1 years
Non-compete agreements
1,449

 
(1,427
)
 
22

 
2.3 years
Patents
1,525

 
(461
)
 
1,064

 
13.0 years
Other
262

 
(235
)
 
27

 
2.7 years
Total
$
48,643

 
$
(35,669
)
 
$
12,974

 
 

 
As of December 31, 2016
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying Amount
 
Weighted
Average
Amortization
Period
Amortizing intangible assets:
 
 
 
 
 
 
 
Technology
$
28,018

 
$
(19,736
)
 
$
8,282

 
5.3 years
Customer relationships
16,009

 
(8,857
)
 
7,152

 
8.0 years
Trade names
1,295

 
(1,277
)
 
18

 
2.1 years
Non-compete agreements
1,446

 
(1,220
)
 
226

 
2.3 years
Patents
1,180

 
(376
)
 
804

 
12.4 years
Other
263

 
(235
)
 
28

 
2.7 years
Total
$
48,211

 
$
(31,701
)
 
$
16,510

 
 
 
Amortization expense is calculated over the estimated useful life of the asset. Aggregate amortization expense for intangible assets was $1.1 million and $1.7 million for the three months ended September 30, 2017 and 2016, respectively. Aggregate amortization expense for intangible assets was $4.0 million and $5.0 million for the nine months ended September 30, 2017 and 2016, respectively. For the three and nine months ended September 30, 2017 and 2016, respectively, a portion of this amortization is included in cost of revenue. Estimated amortization expense for the next five years is as follows (amounts in thousands):  
 
Estimated Amortization Expense
2017
$
719

2018
2,594

2019
2,386

2020
2,190

2021
1,980

Thereafter
3,105

Total
$
12,974