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Goodwill and Intangible Assets (Notes)
3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and Intangible Assets, Net

Goodwill

The following table presents the changes in the carrying amount of our goodwill (in thousands):
 
 
Total
Balance as of December 31, 2017
 
$
12,357

Currency translation
 
(43
)
Balance as of March 31, 2018
 
$
12,314



Intangible Assets, Net

Intangible assets, carried at cost less accumulated amortization and amortized on a straight-lined basis, were as follows (in thousands):
 
 
Weighted
Average
 
March 31, 2018
 
 
Amortization
Life in Years
 
Cost
 
Accumulated
Amortization
 
Net
Patents
 
10
 
$
17,664

 
$
11,249

 
$
6,415

Customer contracts
 
9
 
5,319

 
4,987

 
332

Non-contractual customer relationships
 
9
 
55,131

 
8,187

 
46,944

Trademarks
 
4
 
425

 
425

 

Trade name
 
15
 
7,310

 
1,218

 
6,092

Developed technology
 
11
 
82,568

 
9,467

 
73,101

Total amortized intangible assets
 
 
 
$
168,417

 
$
35,533

 
$
132,884

 
 
 
 
 
 
 
 
 
IPR&D
 
 
 
$
3,761

 

 
$
3,761

 
 
 
 
 
 
 
 
 
Total intangible assets
 
 
 
$
172,178

 
$
35,533

 
$
136,645


 
 
Weighted
Average
 
December 31, 2017
 
 
Amortization
Life in Years
 
Cost
 
Accumulated
Amortization
 
Net
Patents
 
10
 
$
17,064

 
$
10,970

 
$
6,094

Customer contracts
 
9
 
5,319

 
4,892

 
427

Non-contractual customer relationships
 
9
 
55,080

 
6,562

 
48,518

Trademarks
 
4
 
425

 
425

 

Trade name
 
15
 
7,310

 
1,096

 
6,214

Developed technology
 
11
 
81,846

 
7,571

 
74,275

Total amortized intangible assets
 
 
 
$
167,044

 
$
31,516

 
$
135,528

 
 
 
 
 
 
 
 
 
IPR&D
 
 
 
$
8,225

 
 
 
$
8,225

 
 
 
 
 
 
 
 
 
Total intangible assets
 
 
 
$
175,269

 
$
31,516

 
$
143,753



Intangible assets with definite lives are amortized on a straight-line basis over their estimated useful lives. During the three months ended March 31, 2018 and 2017, intangible asset amortization expense was $4.1 million and $3.4 million, respectively.

As of March 31, 2018 estimated annual amortization for our intangible assets for each of the next five years is approximately (in thousands):

Remainder of 2018
 
$
12,255

2019
 
15,878

2020
 
15,739

2021
 
15,486

2022
 
15,311

Thereafter
 
58,215

Total
 
$
132,884