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Leases - Schedule of Operating Lease Activities (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Schedule of Operating Lease Activities [Abstract] |  |
Operating lease right-of-use assets obtained in exchange for lease liabilities | $ 233 | $ 1,023
Operating lease expense |  |
Amortization of right-of-use assets | 2,121 | 3,105
Interest of lease liabilities | 245 | 494
Total | $ 2,366 | $ 3,599

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- Definition Represent the amount of amortization of right-of-use assets. + References No definition available. + Details
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Namespace Prefix: | sfwl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represent the amount of interest of lease liabilities. + References No definition available. + Details
Name: | sfwl_InterestOfLeaseLiabilities
Namespace Prefix: | sfwl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Operating lease right-of-use assets obtained (extinguished) in exchange for lease liabilities. + References No definition available. + Details
Name: | sfwl_OperatingLeaseRightofuseAssetsObtainedExtinguishedInExchangeForLeaseLiabilities
Namespace Prefix: | sfwl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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