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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | GOODWILL AND INTANGIBLE ASSETS The changes in the carrying amount of goodwill for the years ended December 31, 2016 and 2015, are as follows (in thousands):
| 2016 |  | 2015
Goodwill balance at January 1 | $ | 184,472 |  |  | $ | 184,464 |
Effect of foreign exchange | 82 |  |  | (52 | )
Additions as the result of acquisitions | 27,373 |  |  | 60 |
Goodwill balance at December 31 | $ | 211,927 |  |  | $ | 184,472 |
As of December 31, 2016, we had recorded $8.3 million of accumulated goodwill impairment charges. All of the goodwill balance as of December 31, 2016 and 2015, is related to our cardiovascular segment. Other intangible assets at December 31, 2016 and 2015, consisted of the following (in thousands):
| 2016
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Patents | $ | 14,130 |  |  | $ | (3,165 | ) |  | $ | 10,965 |
Distribution agreements | 6,626 |  |  | (3,527 | ) |  | 3,099 |
License agreements | 20,695 |  |  | (3,422 | ) |  | 17,273 |
Trademarks | 12,380 |  |  | (3,330 | ) |  | 9,050 |
Covenants not to compete | 1,028 |  |  | (936 | ) |  | 92 |
Customer lists | 22,261 |  |  | (15,401 | ) |  | 6,860 |
Royalty agreements | 267 |  |  | (267 | ) |  | — |
Total | $ | 77,387 |  |  | $ | (30,048 | ) |  | $ | 47,339 |
| 2015
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Patents | $ | 12,014 |  |  | $ | (2,595 | ) |  | $ | 9,419 |
Distribution agreements | 5,626 |  |  | (2,853 | ) |  | 2,773 |
License agreements | 19,109 |  |  | (2,438 | ) |  | 16,671 |
Trademarks | 7,259 |  |  | (2,554 | ) |  | 4,705 |
Covenants not to compete | 1,028 |  |  | (873 | ) |  | 155 |
Customer lists | 20,793 |  |  | (15,023 | ) |  | 5,770 |
Royalty agreements | 267 |  |  | (267 | ) |  | — |
Total | $ | 66,096 |  |  | $ | (26,603 | ) |  | $ | 39,493 |
Aggregate amortization expense for the years ended December 31, 2016, 2015 and 2014 was approximately $19.3 million, $14.8 million and $14.9 million, respectively. We evaluate long-lived assets, including amortizing intangible assets, for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. We perform the impairment analysis at the asset group for which the lowest level of identifiable cash flows are largely independent of the cash flows of other assets and liabilities. We did not record any impairment charges during the years ended December 31, 2016 and 2015. During the third quarter of 2014, we compared the carrying value of the amortizing intangible assets acquired in our January 2012 acquisition of Ostial to the undiscounted cash flows expected to result from the asset group and determined that the carrying amount was not recoverable. We then determined the fair value of the amortizing assets related to the Ostial acquisition based on estimated future cash flows discounted back to their present value using a discount rate that reflects the risk profiles of the underlying activities. Some of the factors that influenced our estimated cash flows were slower than anticipated sales growth in the products acquired from our Ostial acquisition and uncertainty about future sales growth. The excess of the carrying value compared to the fair value was recognized as an intangible asset impairment charge. We recorded an impairment charge for Ostial of approximately $1.1 million, which was offset by approximately $874,000 of fair value reductions to the related contingent consideration liability. Estimated amortization expense for the developed technology and other intangible assets for the next five years consists of the following as of December 31, 2016 (in thousands):
Year Ending December 31 |
2017 | $ | 21,800 |
2018 | 21,229 |
2019 | 20,826 |
2020 | 19,732 |
2021 | 13,296 |

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 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=35741047&loc=d3e13816-109267 Reference 5: 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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