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Commitments and Contingencies - Minimum Future Lease Payments for both Continuing and Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014
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Commitments And Contingencies Disclosure [Abstract] |
2015 | $ 99,939 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 | 91,042 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 | 76,620 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 | 64,124 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 | 51,267 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter | 124,232 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
2015 | (15,809)sah_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsReceivableCurrent
2016 | (14,370)sah_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsReceivableInTwoYears
2017 | (10,762)sah_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsReceivableInThreeYears
2018 | (9,154)sah_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsReceivableInFourYears
2019 | (8,055)sah_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsReceivableInFiveYears
Thereafter | $ (32,935)sah_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsReceivableThereafter

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- Definition Operating leases future minimum payments due future minimum sublease rentals receivable current. + References No definition available. + Details
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Period Type: | instant

X
- Definition Operating leases future minimum payments due future minimum sublease rentals receivable in five years. + References No definition available. + Details
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- Definition Operating leases future minimum payments due future minimum sublease rentals receivable in four years. + References No definition available. + Details
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Namespace Prefix: | sah_
Data Type: | xbrli:monetaryItemType
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- Definition Operating leases future minimum payments due future minimum sublease rentals receivable in three years. + References No definition available. + Details
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- Definition Operating leases future minimum payments due future minimum sublease rentals receivable in two years. + References No definition available. + Details
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- Definition Operating leases future minimum payments due future minimum sublease rentals receivable thereafter. + References No definition available. + Details
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- Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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X
- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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