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Long-Term Debt Long-Term Debt - Covenants (Details) - 2016 Credit facility | Dec. 31, 2021 USD ($)
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Line of Credit Facility [Line Items] |
Minimum EBTDAR to rent ratio | 1205.00%
Required ratio |
Line of Credit Facility [Line Items] |
Minimum EBTDAR to rent ratio | 150.00%
Minimum |
Line of Credit Facility [Line Items] |
Net income and retained earnings free of restrictions | $ 399,800,000

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- Definition Debt instrument covenant compliance unrestricted net income (loss) and retained earnings. + References No definition available. + Details
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Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Minimum EBTDAR to rent ratio. + References No definition available. + Details
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Namespace Prefix: | sah_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |