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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in carrying amount of goodwill | The changes in the carrying amount of goodwill for the years ended December 31, 2014 and 2013, are as follows (in thousands):
| 2014 |  | 2013
Goodwill balance at January 1 | $ | 184,505 |  |  | $ | 175,108 |
Effect of foreign exchange | (41 | ) |  | $ | — |
Adjustment related to previous acquisitions | — |  |  | 381 |
Additions as the result of acquisitions | — |  |  | 9,016 |
Goodwill balance at December 31 | $ | 184,464 |  |  | $ | 184,505 |
Other intangible assets | Other intangible assets at December 31, 2014 and 2013, consisted of the following (in thousands):
| 2014
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Patents | $ | 10,199 |  |  | $ | (2,196 | ) |  | $ | 8,003 |
Distribution agreements | 5,376 |  |  | (2,285 | ) |  | 3,091 |
License agreements | 8,995 |  |  | (1,823 | ) |  | 7,172 |
Trademarks | 7,298 |  |  | (2,079 | ) |  | 5,219 |
Covenants not to compete | 1,029 |  |  | (636 | ) |  | 393 |
Customer lists | 20,452 |  |  | (13,194 | ) |  | 7,258 |
Royalty agreements | 267 |  |  | (267 | ) |  | — |
Total | $ | 53,616 |  |  | $ | (22,480 | ) |  | $ | 31,136 |
| 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 the developed technology and other intangible assets for the next five years consists of the following as of December 31, 2014 (in thousands):
Year Ending December 31 |
2015 | $ | 14,525 |
2016 | 14,381 |
2017 | 13,911 |
2018 | 13,197 |
2019 | 12,916 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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