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Intangible Assets
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets
Amortized intangible assets consisted of the following (in thousands):
 
Gross
Carrying
Value
 
Accumulated
Amortization
 
Net
Carrying
Value
Distribution networks
$
38,060

 
$
35,051

 
$
3,009

Customer contracts and relationships
4,880

 
4,749

 
131

Completed technologies
4,340

 
1,165

 
3,175

Balance as of December 31, 2015
$
47,280

 
$
40,965

 
$
6,315

 
 
 
 
 
 
 
Gross
Carrying
Value
 
Accumulated
Amortization
 
Net
Carrying
Value
Distribution networks
$
38,060

 
$
31,765

 
$
6,295

Customer contracts and relationships
4,740

 
4,740

 

Completed technologies
3,750

 
375

 
3,375

Balance as of December 31, 2014
$
46,550

 
$
36,880

 
$
9,670


Estimated amortization expense for each of the five succeeding fiscal years and thereafter is as follows (in thousands):
Year Ended December 31,
 
Amount
2016
 
$
3,267

2017
 
1,534

2018
 
896

2019
 
521

2020
 
97

Thereafter
 

 
 
$
6,315