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GOODWILL AND INTANGIBLE ASSETS | 62 Months Ended
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Dec. 31, 2012
GOODWILL AND INTANGIBLE ASSETS | K. GOODWILL AND INTANGIBLE ASSETS Goodwill Teradyne performs its annual goodwill impairment test as required under the provisions of ASC 350-10, “Intangibles — Goodwill and Other” on December 31 of each fiscal year unless interim indicators of impairment exist. Goodwill is considered to be impaired when the net book value of a reporting unit exceeds its estimated fair value. Fair values are estimated using a discounted cash flow methodology. Teradyne performed its 2012 and 2011 annual goodwill impairment test at the Wireless Test reporting unit level which is an operating and reportable segment and the only operating and reportable segment that has goodwill. There was no impairment. During 2012, Teradyne recorded a $3.5 million decrease in goodwill and a $3.5 million increase in income tax receivable. The changes in the carrying amount of goodwill by reporting units for the years ended December 31, 2012 and 2011 are as follows:
|  | Semiconductor Test |  |  | Systems Test Group |  |  | Wireless Test |  |  | Total |
|  | (in thousands) |
Balance at December 31, 2010: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 260,540 |  |  | $ | 148,183 |  |  | $ | — |  |  | $ | 408,723 |
Accumulated impairment losses |  |  | (260,540 | ) |  |  | (148,183 | ) |  |  | — |  |  |  | (408,723 | )
|  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Activity during the year |  |  | — |  |  |  | — |  |  |  | 352,778 |  |  |  | 352,778 |
Balance at December 31, 2011: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 260,540 |  |  |  | 148,183 |  |  |  | 352,778 |  |  |  | 761,501 |
Accumulated impairment losses |  |  | (260,540 | ) |  |  | (148,183 | ) |  |  | — |  |  |  | (408,723 | )
|  |  | — |  |  |  | — |  |  |  | 352,778 |  |  |  | 352,778 |
Activity during the year |  |  | — |  |  |  | — |  |  |  | (3,506 | ) |  |  | (3,506 | )
Balance at December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 260,540 |  |  |  | 148,183 |  |  |  | 349,272 |  |  |  | 757,995 |
Accumulated impairment losses |  |  | (260,540 | ) |  |  | (148,183 | ) |  |  | — |  |  |  | (408,723 | )
|  | $ | — |  |  | $ | — |  |  | $ | 349,272 |  |  | $ | 349,272 |
Intangible Assets Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheets:
|  | December 31, 2012 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted Average Useful Life |
|  | (in thousands) |
Developed technology |  | $ | 357,555 |  |  | $ | 143,126 |  |  | $ | 214,429 |  |  |  | 6.3 years |
Customer relationships and service and software maintenance contracts |  |  | 144,971 |  |  |  | 63,464 |  |  |  | 81,507 |  |  |  | 8.0 years |
Tradenames and trademarks |  |  | 33,840 |  |  |  | 10,909 |  |  |  | 22,931 |  |  |  | 9.0 years |
Customer backlog |  |  | 1,000 |  |  |  | 1,000 |  |  |  | — |  |  |  | 0.4 years |
Total intangible assets |  | $ | 537,366 |  |  | $ | 218,499 |  |  | $ | 318,867 |  |  |  | 7.0 years |
|  | December 31, 2011 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted Average Useful Life |
|  | (in thousands) |
Developed technology |  | $ | 358,155 |  |  | $ | 91,391 |  |  | $ | 266,764 |  |  |  | 6.3 years |
Customer relationships and service and software maintenance contracts |  |  | 144,971 |  |  |  | 45,230 |  |  |  | 99,741 |  |  |  | 8.0 years |
Tradenames and trademarks |  |  | 33,840 |  |  |  | 7,370 |  |  |  | 26,470 |  |  |  | 9.0 years |
Customer backlog |  |  | 1,000 |  |  |  | 1,000 |  |  |  | — |  |  |  | 0.4 years |
Total intangible assets |  | $ | 537,966 |  |  | $ | 144,991 |  |  | $ | 392,975 |  |  |  | 7.0 years |
During the year ended December 31, 2012, Teradyne reduced the gross amount of intangible assets by $0.6 million for the excess tax benefit realized due to the exercise of stock options vested as of the Nextest acquisition date. Aggregate intangible assets amortization expense for the years ended December 31, 2012, 2011 and 2010 was $73.5 million, $40.5 million, and $29.3 million, respectively. Estimated intangible assets amortization expense for each of the five succeeding fiscal years is as follows:
Year |  | Amortization Expense |
|  | (in thousands) |
2013 |  | $ | 72,132 |
2014 |  |  | 69,102 |
2015 |  |  | 52,351 |
2016 |  |  | 52,351 |
2017 |  |  | 46,193 |

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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=7658586&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=7658586&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=7658586&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 42, 43, 44, 45, 46, 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 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=14024403&loc=d3e13854-109267 Reference 6: 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 + Details
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