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Goodwill and Intangible Assets (Notes)
6 Months Ended
Jun. 30, 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

Goodwill acquired
 
1,300

Other
 

Currency translation
 
(309
)
Balance as of June 30, 2018
 
$
13,348



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
 
June 30, 2018
 
 
Amortization
Life in Years
 
Cost
 
Accumulated
Amortization
 
Net
Patents
 
10
 
$
18,606

 
$
11,537

 
$
7,069

Customer contracts
 
9
 
5,319

 
5,082

 
237

Non-contractual customer relationships
 
9
 
55,979

 
9,929

 
46,050

Trademarks
 
4
 
425

 
425

 

Trade name
 
15
 
7,310

 
1,340

 
5,970

Developed technology
 
11
 
81,963

 
11,379

 
70,584

Total amortized intangible assets
 
 
 
$
169,602

 
$
39,692

 
$
129,910

 
 
 
 
 
 
 
 
 
IPR&D
 
 
 
$
4,902

 

 
$
4,902

 
 
 
 
 
 
 
 
 
Total intangible assets
 
 
 
$
174,504

 
$
39,692

 
$
134,812


 
 
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 and six months ended June 30, 2018, intangible asset amortization expense was $4.0 million and $8.1 million, respectively, as compared to $3.9 million and $7.3 million for the three and six months ended June 30, 2017, respectively.

As of June 30, 2018 estimated annual amortization for our intangible assets for each of the next five years is approximately (in thousands):

Remainder of 2018
 
$
8,327

2019
 
15,964

2020
 
15,820

2021
 
15,517

2022
 
15,378

Thereafter
 
58,904

Total
 
$
129,910