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Stock Repurchase Program - Narrative (Details) - USD ($)	Mar. 11, 2021	Oct. 26, 2025
Equity [Abstract]
Additional stock repurchase amount authorized	$ 350,000,000
Remaining authorization under stock repurchase program		$ 209,400,000

X

- Definition

Stock Repurchase Program, Increase In Authorized Amount

+ References

No definition available.

+ Details

Name:	smtc_StockRepurchaseProgramIncreaseInAuthorizedAmount
Namespace Prefix:	smtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant