Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Future Maturities of Long-Term Debt (Detail)

v2.4.1.9
Long-Term Debt - Future Maturities of Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Debt Disclosure [Abstract]  
Principal, 2015 $ 30,654us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Principal, 2016 48,190us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Principal, 2017 34,520us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Principal, 2018 46,898us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Principal, 2019 10,771us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Principal, Thereafter 604,140us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Principal amount, Total 775,173sah_DebtInstrumentsPrincipalOutstanding
Net of Discount/Premium, 2015 30,802sah_DebtInstrumentNetOfUnamortizedDiscountOrPremiumNextTwelveMonths
Net of Discount/Premium, 2016 48,036sah_DebtInstrumentNetOfUnamortizedDiscountOrPremiumYearTwo
Net of Discount/Premium, 2017 34,397sah_DebtInstrumentNetOfUnamortizedDiscountOrPremiumYearThree
Net of Discount/Premium, 2018 46,898sah_DebtInstrumentNetOfUnamortizedDiscountOrPremiumYearFour
Net of Discount/Premium, 2019 10,771sah_DebtInstrumentNetOfUnamortizedDiscountOrPremiumYearFive
Net of Discount/Premium, Thereafter 602,508sah_DebtInstrumentNetOfUnamortizedDiscountOrPremiumAfterYearFive
Net of Discount/Premium, Total $ 773,412us-gaap_LongTermDebt