Annual report pursuant to Section 13 and 15(d)

Business Acquisitions and Dispositions - Summary of Consolidated Pro Forma Results of Future Operations (Detail)

v2.4.1.9
Business Acquisitions and Dispositions - Summary of Consolidated Pro Forma Results of Future Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Business Combinations [Abstract]    
Total revenues $ 9,324,013us-gaap_BusinessAcquisitionsProFormaRevenue $ 9,000,959us-gaap_BusinessAcquisitionsProFormaRevenue
Gross profit 1,382,600sah_BusinessAcquisitionsProFormaGrossProfit 1,322,044sah_BusinessAcquisitionsProFormaGrossProfit
Income from continuing operations before taxes 164,493sah_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeTax 131,594sah_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeTax
Net income from continuing operations $ 100,245us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss $ 86,367us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Diluted earnings per share from continuing operations $ 1.90sah_BusinessAcquisitionProFormaEarningsPerShareBasicAndDilutedFromContinuingOperation $ 1.62sah_BusinessAcquisitionProFormaEarningsPerShareBasicAndDilutedFromContinuingOperation