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Goodwill and Intangible Assets
6 Months Ended
Jun. 30, 2016
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 six months ended June 30, 2016 are as follows (amounts in thousands):
 
Business
 
Consumer
 
Consolidated
Balance as of December 31, 2015
$
72,298

 
$
8,024

 
$
80,322

Adjustments to goodwill:
 
 
 
 
 
Foreign exchange adjustment
38

 

 
38

Balance as of June 30, 2016
$
72,336

 
$
8,024

 
$
80,360

Intangible Assets
Intangible assets are summarized as follows (see Note 8) (amounts in thousands):
 
As of June 30, 2016
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying Amount
 
Weighted
Average
Amortization
Period
Amortizing intangible assets:
 
 
 
 
 
 
 
Technology
$
28,050

 
$
(17,818
)
 
$
10,232

 
4.7 years
Customer relationships
16,016

 
(7,777
)
 
8,239

 
5.8 years
Trade names
1,298

 
(1,271
)
 
27

 
2.6 years
Non-compete agreements
1,448

 
(1,079
)
 
369

 
1.7 years
Patents
3,690

 
(1,034
)
 
2,656

 
10.4 years
Other
262

 
(235
)
 
27

 
3.0 years
Total
$
50,764

 
$
(29,214
)
 
$
21,550

 
 
 
As of December 31, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying Amount
 
Weighted
Average
Amortization
Period
Amortizing intangible assets:
 
 
 
 
 
 
 
Technology
$
28,005

 
$
(15,723
)
 
$
12,282

 
4.7 years
Customer relationships
16,008

 
(6,873
)
 
9,135

 
5.8 years
Trade names
1,287

 
(1,250
)
 
37

 
2.6 years
Non-compete agreements
1,446

 
(936
)
 
510

 
1.7 years
Patents
3,440

 
(848
)
 
2,592

 
10.4 years
Other
312

 
(249
)
 
63

 
3.0 years
Total
$
50,498

 
$
(25,879
)
 
$
24,619

 
 
 
Amortization expense is calculated over the estimated useful life of the asset. Aggregate amortization expense for intangible assets was $1.7 million and $2.0 million for the three months ended June 30, 2016 and 2015, respectively. Aggregate amortization expense for intangible assets was $3.3 million and $4.2 million for the six months ended June 30, 2016 and 2015, respectively. For the three and six months ended June 30, 2016 and 2015, 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
2016
$
3,326

2017
4,934

2018
2,827

2019
2,608

2020
2,417

Thereafter
5,438

Total
$
21,550