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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill by Segment and Changes in Carrying Amount of Goodwill | A summary of the goodwill by segment and the changes in the carrying amount of goodwill is shown in the following table (in thousands).
|  | BT |  |  | M&S |  |  | Events |  |  | Total |
Balance, December 31, 2012 |  | $ | 43,491 |  |  | $ | 33,362 |  |  | $ | 2,101 |  |  | $ | 78,954 |
Translation adjustments |  |  | 577 |  |  |  | 442 |  |  |  | 28 |  |  |  | 1,047 |
Balance, December 31, 2013 |  | $ | 44,068 |  |  | $ | 33,804 |  |  | $ | 2,129 |  |  | $ | 80,001 |
|  | Products |  |  | Research |  |  | Project Consulting |  |  | Total |
Balance, January 1, 2014 |  | $ | 2,560 |  |  | $ | 77,441 |  |  | $ | — |  |  | $ | 80,001 |
Translation adjustments |  |  | (106 | ) |  |  | (3,212 | ) |  |  | — |  |  |  | (3,318 | )
Balance, December 31, 2014 |  | $ | 2,454 |  |  | $ | 74,229 |  |  | $ | — |  |  | $ | 76,683 |
Summary of Intangible Assets | A summary of Forrester’s intangible assets is as follows (in thousands):
|  | December 31, 2014 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Amortizable intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 32,995 |  |  | $ | 29,613 |  |  | $ | 3,382 |
Research content |  |  | 4,699 |  |  |  | 4,699 |  |  |  | — |
Technology |  |  | 1,507 |  |  |  | 1,507 |  |  |  | — |
Trademarks |  |  | 73 |  |  |  | 73 |  |  |  | — |
Total |  | $ | 39,274 |  |  | $ | 35,892 |  |  | $ | 3,382 |
|  | December 31, 2013 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Amortizable intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 33,927 |  |  | $ | 28,552 |  |  | $ | 5,375 |
Research content |  |  | 4,699 |  |  |  | 4,699 |  |  |  | — |
Technology |  |  | 1,507 |  |  |  | 1,105 |  |  |  | 402 |
Trademarks |  |  | 73 |  |  |  | 73 |  |  |  | — |
Total |  | $ | 40,206 |  |  | $ | 34,429 |  |  | $ | 5,777 |
Estimated Amortization Expense Related to Intangible Assets | Estimated amortization expense related to intangible assets that will continue to be amortized is as follows (in thousands):
Year ending December 31, 2015 |  | $ | 927 |
Year ending December 31, 2016 |  |  | 872 |
Year ending December 31, 2017 |  |  | 822 |
Year ending December 31, 2018 |  |  | 761 |
Total |  | $ | 3,382 |

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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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