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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Other intangible assets
Other intangible assets at June 30, 2014 and December 31, 2013, consisted of the following (in thousands):
 
June 30, 2014
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
Patents
$
10,108

 
$
(2,511
)
 
$
7,597

Distribution agreements
5,176

 
(2,019
)
 
3,157

License agreements
3,783

 
(1,509
)
 
2,274

Trademarks
7,619

 
(2,091
)
 
5,528

Covenants not to compete
1,029

 
(518
)
 
511

Customer lists
20,621

 
(12,106
)
 
8,515

Royalty agreements
267

 
(267
)
 
—

 
 
 
 
 
 
Total
$
48,603

 
$
(21,021
)
 
$
27,582


 
December 31, 2013
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Carrying
Amount
Patents
$
9,302

 
$
(2,374
)
 
$
6,928

Distribution agreements
5,176

 
(1,780
)
 
3,396

License agreements
3,783

 
(1,249
)
 
2,534

Trademarks
7,622

 
(1,844
)
 
5,778

Covenants not to compete
1,029

 
(399
)
 
630

Customer lists
20,626

 
(10,957
)
 
9,669

Royalty agreements
267

 
(267
)
 
—

 
 
 
 
 
 
Total
$
47,805

 
$
(18,870
)
 
$
28,935
Estimated amortization expense
Estimated amortization expense for developed technology and other intangible assets for the next five years consists of the following as of June 30, 2014 (in thousands):

Year Ending December 31
 
Remaining 2014
$
7,741

2015
14,793

2016
14,059

2017
13,661

2018
13,137