XML 31 R89.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Commitments and Contingencies - Summary of Lease Exit Accruals (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract] |
Beginning balance | $ 27,234 sah_LeaseExitAccruals
Lease exit expense | 302 sah_LeaseExitExpense
Payments | (7,018)sah_LeaseExitPayment
Lease buyout | (1,556)sah_LeaseBuyout
Ending balance | $ 18,962 sah_LeaseExitAccruals

X
- Definition Lease buyout. + References No definition available. + Details
Name: | sah_LeaseBuyout
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lease exit accruals. + References No definition available. + Details
Name: | sah_LeaseExitAccruals
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Lease exit expense. + References No definition available. + Details
Name: | sah_LeaseExitExpense
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lease exit payment. + References No definition available. + Details
Name: | sah_LeaseExitPayment
Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration