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v3.22.0.1

Subsequent Events (Details) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) store | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) Business | Jan. 01, 2022 USD ($) $ / shares shares
Subsequent Event [Line Items] |  |  |  |
Number of franchises disposed | 1 |  | 1 |
Cash generated from disposition | $ 6,600 | $ 9,600 | $ 250,700 |
Subsequent Class A Common Stock Repurchase | shares |  |  |  | 500,000
Subsequent Class A Common Stock Repurchase Ave Price | $ / shares |  |  |  | $ 48.76
Subsequent Class A Common Stock Repurchase Amount |  |  |  | $ 202,000

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- Definition Number of franchises disposed. + References No definition available. + Details
Name: | sah_NumberOfFranchisesDisposed
Namespace Prefix: | sah_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Proceeds from dispositions of franchises. + References No definition available. + Details
Name: | sah_ProceedsFromDispositionsOfFranchises
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Subsequent Class A Common Stock Repurchase + References No definition available. + Details
Name: | sah_SubsequentClassACommonStockRepurchase
Namespace Prefix: | sah_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Subsequent Class A Common Stock Repurchase Amount + References No definition available. + Details
Name: | sah_SubsequentClassACommonStockRepurchaseAmount
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Subsequent Class A Common Stock Repurchase Ave Price + References No definition available. + Details
Name: | sah_SubsequentClassACommonStockRepurchaseAvePrice
Namespace Prefix: | sah_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration