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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2012
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, 2012 and 2011, are as follows (in thousands):
| 2012 |  | 2011
Goodwill balance at January 1 | $ | 61,144 |  |  | $ | 58,675 |
Adjustment related to previous acquisitions | 280 |  |  | (228 | )
Additions as the result of acquisitions | 113,684 |  |  | 2,697 |
Goodwill balance at December 31 | $ | 175,108 |  |  | $ | 61,144 |
Other intangible assets | Other intangible assets at December 31, 2012 and 2011, consisted of the following (in thousands):
| 2012
| Gross |  |  |  | Net
| Carrying Amount |  | Accumulated Amortization |  | Carrying Amount
Patents | $ | 7,843 |  |  | $ | (2,045 | ) |  | $ | 5,798 |
Distribution agreement | 5,176 |  |  | (1,301 | ) |  | 3,875 |
License agreements | 2,733 |  |  | (861 | ) |  | 1,872 |
Trademarks | 7,311 |  |  | (1,362 | ) |  | 5,949 |
Covenant 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 |
| 2011
| Gross |  |  |  | Net
| Carrying Amount |  | Accumulated Amortization |  | Carrying Amount
Patents | $ | 6,455 |  |  | $ | (1,704 | ) |  | $ | 4,751 |
Distribution agreement | 2,426 |  |  | (900 | ) |  | 1,526 |
License agreements | 1,983 |  |  | (436 | ) |  | 1,547 |
Trademarks | 5,746 |  |  | (1,014 | ) |  | 4,732 |
Covenant not to compete | 315 |  |  | (108 | ) |  | 207 |
Customer lists | 14,277 |  |  | (5,786 | ) |  | 8,491 |
Royalty agreements | 267 |  |  | (267 | ) |  | — |
Total | $ | 31,469 |  |  | $ | (10,215 | ) |  | $ | 21,254 |
Estimated amortization expense | Estimated amortization expense for the intangible assets for the next five years consists of the following as of December 31, 2012 (in thousands):
Year Ending December 31 |
2013 | $ | 13,934 |
2014 | 13,264 |
2015 | 12,738 |
2016 | 12,274 |
2017 | 11,917 |

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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 No definition available. + 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 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: 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=7658586&loc=d3e16265-109275 + 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 Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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