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Goodwill and Intangible Assets | 9 Months Ended
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Oct. 29, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Goodwill – There were no events or changes in circumstances that would indicate the carrying amount of goodwill may not be recoverable as of October 29, 2017 and January 29, 2017. Goodwill by applicable reporting unit is as follows:
(in thousands) | Signal Integrity |  | Power and High Reliability |  | Wireless and Sensing |  | Total
Balance at January 29, 2017 | $ | 261,891 |  |  | $ | 49,384 |  |  | $ | 18,428 |  |  | $ | 329,703 |
Additions (1) | 12,187 |  |  | — |  |  | — |  |  | 12,187 |
Balance at October 29, 2017 | $ | 274,078 |  |  | $ | 49,384 |  |  | $ | 18,428 |  |  | $ | 341,890 |
(1) Composed of goodwill recognized on the acquisition date and subsequent adjustments resulting from changes to the acquisition date fair values of net assets acquired in the business combination recorded during their respective measurement periods. During the second quarter of fiscal year 2018, goodwill associated with the Signal Integrity product group increased due to the Company’s acquisition of AptoVision (see Note 2). Purchased Intangibles – The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions, which continue to be amortized:
|  |  | October 29, 2017 |  | January 29, 2017
(in thousands) | Estimated Useful Life |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Core technologies | 5-8 years |  | $ | 164,930 |  |  | $ | (109,609 | ) |  | $ | 55,321 |  |  | $ | 144,930 |  |  | $ | (92,940 | ) |  | $ | 51,990 |
Customer relationships | 5-10 years |  | 34,030 |  |  | (23,991 | ) |  | 10,039 |  |  | 30,030 |  |  | (20,247 | ) |  | 9,783 |
Total finite-lived intangible assets |  |  | $ | 198,960 |  |  | $ | (133,600 | ) |  | $ | 65,360 |  |  | $ | 174,960 |  |  | $ | (113,187 | ) |  | $ | 61,773 |
The following table sets forth the Company’s finite-lived intangible assets resulting from acquisitions:
(in thousands) | Gross Carrying Value
Value at January 29, 2017 | $ | 174,960 |
Acquired intangible assets | 24,000 |
Value at October 29, 2017 | $ | 198,960 |
For the three months ended October 29, 2017 and October 30, 2016, amortization expense related to acquired finite-lived intangible assets was $7.5 million and $6.3 million, respectively. For the nine months ended October 29, 2017 and October 30, 2016, amortization expense related to acquired finite-lived intangible assets was $20.4 million and $19.0 million, respectively. Amortization expense related to acquired finite-lived intangible assets is reported as "Intangible amortization" within the Statements of Income. The following table sets forth the Company’s indefinite-lived intangible assets resulting from additions to IPR&D:
(in thousands) | Net Carrying Value
Value at January 29, 2017 | $ | — |
In-process research and development through acquisitions | 2,300 |
Value at October 29, 2017 | $ | 2,300 |
The Company reviews indefinite-lived intangible assets for impairment as of November 30, each year, by comparing the carrying amount of the asset to the future discounted cash flows that asset is expected to generate.

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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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