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Goodwill and Intangible Assets, Net (Tables)
 12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill and changes in the carrying amount of goodwill were as follows: 
(In thousands)
 
Balance at December 31, 2013
$
31,000

FX effects
(261
)
Balance at December 31, 2014
30,739

Goodwill acquired during the period (1)
12,564

FX effects
(187
)
Balance at December 31, 2015
$
43,116
Schedule of Components of Intangible Assets
The components of intangible assets, net were as follows: 
 
December 31,
 
2015
 
2014
(In thousands)
Gross (1)
 
Accumulated
Amortization (1)
 
Net (1)
 
Gross (1)
 
Accumulated
Amortization (1)
 
Net (1)
Distribution rights (10 years)
$
312

 
$
(96
)
 
$
216

 
$
347

 
$
(76
)
 
$
271

Patents (10 years)
11,425

 
(4,737
)
 
6,688

 
10,107

 
(4,736
)
 
5,371

Trademarks and trade names
(10 years) (2)
2,401

 
(1,053
)
 
1,348

 
2,001

 
(834
)
 
1,167

Developed and core technology (5-15 years) (2)
12,587

 
(2,144
)
 
10,443

 
3,506

 
(1,373
)
 
2,133

Capitalized software development costs (2 years)
167

 
(97
)
 
70

 
276

 
(85
)
 
191

Customer relationships
(10-15 years) (2)
27,715

 
(13,554
)
 
14,161

 
26,406

 
(10,925
)
 
15,481

Total intangible assets, net
$
54,607

 
$
(21,681
)
 
$
32,926

 
$
42,643

 
$
(18,029
)
 
$
24,614

 
(1) 
This table excludes the gross value of fully amortized intangible assets totaling $9.0 million and $7.9 million on December 31, 2015 and 2014, respectively.

(2) 
During the third quarter of 2015, we purchased a trade name valued at $0.4 million, which is being amortized ratably over seven years; developed technology valued at $9.1 million, which is being amortized over a weighted average period of approximately five years; and customer relationships valued at $1.3 million, which are being amortized ratably over five years. Refer to Note 21 for further information regarding our purchase of these intangible assets.
Intangible Assets Amortization Expense
Amortization expense by income statement caption was as follows:
 
 
Year Ended December 31,
(In thousands)
2015
 
2014
 
2013
Cost of sales
$
123

 
$
153

 
$
213

Selling, general and administrative
4,719

 
4,009

 
3,914

Total amortization expense
$
4,842

 
$
4,162

 
$
4,127
Schedule of Estimated Future Amortization Expense
Estimated future amortization expense related to our intangible assets at December 31, 2015, is as follows: 
(In thousands)
 
2016
$
6,276

2017
6,204

2018
6,176

2019
6,170

2020
5,394

Thereafter
2,706

Total
$
32,926