XML 90 R79.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details) £ in Thousands, $ in Thousands, $ in Thousands | Oct. 28, 2018 USD ($) | Oct. 28, 2018 GBP (£) | Oct. 28, 2018 CAD ($)
--- | --- | --- | ---
Derivative [Line Items] |  |  |
Number of Instruments | 14 | 14 | 14
Sell USD/Buy CAD Forward Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Number of Instruments | 3 | 3 | 3
Sell USD/Buy GBP Forward Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Number of Instruments | 11 | 11 | 11
Short [Member] | Sell USD/Buy CAD Forward Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Value | $ 4,284 |  |
Short [Member] | Sell USD/Buy GBP Forward Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Value | $ 7,792 |  |
Long [Member] | Sell USD/Buy CAD Forward Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Value |  |  | $ 5,500
Long [Member] | Sell USD/Buy GBP Forward Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Value | £ |  | £ 6,000 |

X
- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 + Details
Name: | us-gaap_DerivativeAssetNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=smtc_SellUSDBuyCADForwardContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=smtc_SellUSDBuyGBPForwardContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |