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Property and Equipment - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Property, Plant and Equipment [Abstract] |  |  |
Interest capitalized in conjunction with construction projects and software development | $ 2.6 | $ 2.2 | $ 1.6
Commitments for facility construction projects | $ 23.3 |  |

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- Definition Commitments for facility construction projects. + References No definition available. + Details
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Namespace Prefix: | sah_
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483013/835-20-50-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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