XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.25.1

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |
Goodwill - Franchise Segment | $ 330,900 |  | $ 331,200 | $ 229,800
Goodwill - Preowned Segment | 0 |  | 0 | 0
Goodwill - Powersports Segment | 27,300 |  | 27,300 | 24,000
GW Accm Amort Fdealer |  |  | 1,100,000 |
GW Amm Amort Preowned |  |  | 202,900 |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment charges | (1,400) | $ 1,000 |  |
Goodwill [Line Items] |  |  |  |
Goodwill - Preowned Segment | 0 |  | 0 | 0
Goodwill and Intangible Asset Impairment |  |  | (200) |
Goodwill | 358,200 |  | 358,500 | 253,800
Goodwill and Intangible Assets Acquired |  |  | 11,400 |
Goodwill - Franchise Segment | 330,900 |  | 331,200 | 229,800
Goodwill - Powersports Segment | 27,300 |  | 27,300 | 24,000
PY Acq GW Allocations | (300) |  | 93,500 |
PY Acq GW Allocations Fdealer | (300) |  | 93,500 |
PY Acq GW Allocations Preowned | 0 |  | 0 |
PY Acq GW Allocations Powersports | 0 |  | 0 |
Goodwill and Intangible Assets Acquired Fdealer |  |  | 8,100 |
Goodwill and Intangible Assets Acquired Preowned |  |  | 0 |
Goodwill and Intangible Assets Acquired Powersports |  |  | 3,300 |
GW Asset Impairment Fdealer |  |  | (200) |
GW Asset Impairment Preowned |  |  | 0 |
GW Asset Impairment Powersports |  |  | 0 |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |
Franchise Assets - Franchised | 382,600 |  | 382,600 | 371,700
Intangible Assets Preowned | 0 |  | 0 | 0
Intangible Assets - Powersports | 47,000 |  | 47,700 | 45,700
Franchise Assets - Assets Acquired Franchised |  |  | 10,900 |
Intangible Assets - Assets Acquired Preowned |  |  | 0 |
Intangible Assets - Assets Acquired Powersports |  |  | 2,000 |
Indefinite-Lived Intangible Assets Acquired |  |  | 12,900 |
Franchise Assets Reductions from impairment fdealer | 0 |  |  |
Intangible assets - Reductions from impairment preowned | 0 |  |  |
Intangible assets - Reductions from impairment powersports | (700) |  |  |
Goodwill and Intangible Asset Impairment |  |  | (200) |
Other Intangible Assets, net | 429,600 |  | $ 430,300 | $ 417,400
Reductions from impairment, total | (700) |  |  |
EchoPark Segment [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment charges | 200 |  |  |
Powersports Segment |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment charges | $ 1,100 |  |  |

X
- Definition Franchise Assets - Assets Acquired Franchised + References No definition available. + Details
Name: | sah_FranchiseAssetsAssetsAcquiredFranchised
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Franchise Assets - Franchised + References No definition available. + Details
Name: | sah_FranchiseAssetsFranchised
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Franchise Assets Reductions from impairment fdealer + References No definition available. + Details
Name: | sah_FranchiseAssetsReductionsFromImpairmentFdealer
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition GW Accm Amort Fdealer + References No definition available. + Details
Name: | sah_GWAccmAmortFdealer
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition GW Amm Amort Preowned + References No definition available. + Details
Name: | sah_GWAmmAmortPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition GW Asset Impairment Fdealer + References No definition available. + Details
Name: | sah_GWAssetImpairmentFdealer
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition GW Asset Impairment Powersports + References No definition available. + Details
Name: | sah_GWAssetImpairmentPowersports
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition GW Asset Impairment Preowned + References No definition available. + Details
Name: | sah_GWAssetImpairmentPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Goodwill and Intangible Assets Acquired + References No definition available. + Details
Name: | sah_GoodwillAndIntangibleAssetsAcquired
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Goodwill and Intangible Assets Acquired Fdealer + References No definition available. + Details
Name: | sah_GoodwillAndIntangibleAssetsAcquiredFdealer
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Goodwill and Intangible Assets Acquired Powersports + References No definition available. + Details
Name: | sah_GoodwillAndIntangibleAssetsAcquiredPowersports
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Goodwill and Intangible Assets Acquired Preowned + References No definition available. + Details
Name: | sah_GoodwillAndIntangibleAssetsAcquiredPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Goodwill - Franchise Segment + References No definition available. + Details
Name: | sah_GoodwillFranchiseSegment
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Goodwill - Powersports Segment + References No definition available. + Details
Name: | sah_GoodwillPowersportsSegment
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Goodwill - Preowned Segment + References No definition available. + Details
Name: | sah_GoodwillPreownedSegment
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Intangible Assets - Assets Acquired Powersports + References No definition available. + Details
Name: | sah_IntangibleAssetsAssetsAcquiredPowersports
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Intangible Assets - Assets Acquired Preowned + References No definition available. + Details
Name: | sah_IntangibleAssetsAssetsAcquiredPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Intangible Assets - Powersports + References No definition available. + Details
Name: | sah_IntangibleAssetsPowersports
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Intangible Assets Preowned + References No definition available. + Details
Name: | sah_IntangibleAssetsPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Intangible assets - Reductions from impairment powersports + References No definition available. + Details
Name: | sah_IntangibleAssetsReductionsFromImpairmentPowersports
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Intangible assets - Reductions from impairment preowned + References No definition available. + Details
Name: | sah_IntangibleAssetsReductionsFromImpairmentPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition PY Acq GW Allocations + References No definition available. + Details
Name: | sah_PYAcqGWAllocations
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition PY Acq GW Allocations Fdealer + References No definition available. + Details
Name: | sah_PYAcqGWAllocationsFdealer
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition PY Acq GW Allocations Powersports + References No definition available. + Details
Name: | sah_PYAcqGWAllocationsPowersports
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition PY Acq GW Allocations Preowned + References No definition available. + Details
Name: | sah_PYAcqGWAllocationsPreowned
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reductions from impairment, total + References No definition available. + Details
Name: | sah_ReductionsFromImpairmentTotal
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 942 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480095/942-10-S50-1 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 942 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480035/942-10-S99-6 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482130/360-10-45-4 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 13: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 14: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 16: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 17: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 18: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 19: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 29 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-29 Reference 20: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 29 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-29 Reference 21: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 22: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-20 Reference 23: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 24: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 25: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 26: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 27: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 28: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 40 -SubTopic 30 -Topic 350 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-1 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 926 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483154/926-20-50-5 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-41 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 740 -Name Accounting Standards Codification -Section 55 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478064/805-740-55-13 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 39 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-39 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482598/350-20-45-1 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-4 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- 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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A + Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-38 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-31 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479876/805-20-55-14 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 40 -SubTopic 30 -Topic 350 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_IndefinitelivedIntangibleAssetsAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-1 + Details
Name: | us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sah_EchoParkSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sah_PowersportsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |