XML 41 R30.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Goodwill and Intangible Assets (Tables) | 3 Months Ended
--- | ---
Apr. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amounts of Goodwill | Changes in the carrying amount of goodwill by applicable reporting unit were as follows:
(in thousands) | Signal Integrity |  | Wireless and Sensing |  | Total
Balance at January 28, 2018 | $ | 274,085 |  |  | $ | 67,812 |  |  | $ | 341,897 |
Additions | — |  |  | — |  |  | — |
Balance at April 29, 2018 | $ | 274,085 |  |  | $ | 67,812 |  |  | $ | 341,897 |
Schedule of Finite-lived Intangible Assets Acquired | The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions, which continue to be amortized:
|  |  | April 29, 2018 |  | January 28, 2018
(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 |  |  | $ | (121,156 | ) |  | $ | 43,774 |  |  | $ | 164,930 |  |  | $ | (115,628 | ) |  | $ | 49,302 |
Customer relationships | 3-10 years |  | 34,031 |  |  | (26,859 | ) |  | 7,172 |  |  | 34,031 |  |  | (25,426 | ) |  | 8,605 |
Total finite-lived intangible assets |  |  | $ | 198,961 |  |  | $ | (148,015 | ) |  | $ | 50,946 |  |  | $ | 198,961 |  |  | $ | (141,054 | ) |  | $ | 57,907 |
Amortization expenses recorded in the Statements of Income for each period were as follows:
| Three Months Ended
(in thousands) | April 29, 2018 |  | April 30, 2017
Core technologies | $ | 5,528 |  |  | $ | 5,186 |
Customer relationships | 1,433 |  |  | 1,100 |
Total amortization expense | $ | 6,961 |  |  | $ | 6,286 |
Schedule of Indefinite-Lived Intangible Assets | 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 28, 2018 | $ | 2,300 |
In-process research and development through acquisitions | — |
Value at April 29, 2018 | $ | 2,300 |

X
- Definition Schedule Of Finite-lived Intangible Assets Acquired [Table Text Block] + References No definition available. + Details
Name: | smtc_ScheduleOfFinitelivedIntangibleAssetsAcquiredTableTextBlock
Namespace Prefix: | smtc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, 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 (b) -URI http://asc.fasb.org/extlink&oid=66006027&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 3 -Subparagraph (b),(d) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
Name: | us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration