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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2013
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, 2013 and 2012, are as follows (in thousands):
| 2013 |  | 2012
Goodwill balance at January 1 | $ | 175,108 |  |  | $ | 61,144 |
Adjustment related to previous acquisitions | 381 |  |  | 280 |
Additions as the result of acquisitions | 9,016 |  |  | 113,684 |
Goodwill balance at December 31 | $ | 184,505 |  |  | $ | 175,108 |
Other intangible assets | Other intangible assets at December 31, 2013 and 2012, consisted of the following (in thousands):
| 2013
| Gross |  |  |  | Net
| Carrying Amount |  | Accumulated Amortization |  | 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 |
| 2012
| Gross |  |  |  | Net
| Carrying Amount |  | Accumulated Amortization |  | Carrying Amount
Patents | $ | 7,843 |  |  | $ | (2,045 | ) |  | $ | 5,798 |
Distribution agreements | 5,176 |  |  | (1,301 | ) |  | 3,875 |
License agreements | 2,733 |  |  | (861 | ) |  | 1,872 |
Trademarks | 7,311 |  |  | (1,362 | ) |  | 5,949 |
Covenants not to compete | 1,035 |  |  | (160 | ) |  | 875 |
Customer lists | 20,468 |  |  | (8,038 | ) |  | 12,430 |
Royalty agreements | 267 |  |  | (267 | ) |  | — |
Total | $ | 44,833 |  |  | $ | (14,034 | ) |  | $ | 30,799 |
Estimated amortization expense | Estimated amortization expense for the intangible assets for the next five years consists of the following as of December 31, 2013 (in thousands):
Year Ending December 31 |
2014 | $ | 15,189 |
2015 | 14,751 |
2016 | 14,094 |
2017 | 13,678 |
2018 | 13,158 |

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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=14024403&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=14024403&loc=d3e13854-109267 + Details
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