Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail)

v2.4.1.9
Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:    
Accruals and reserves $ 36,633us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals $ 38,931us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
State net operating loss carryforwards 10,307us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 10,194us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Fair value of interest rate swaps 4,203us-gaap_DeferredTaxAssetsDerivativeInstruments 6,185us-gaap_DeferredTaxAssetsDerivativeInstruments
Interest and state taxes associated with the liability for uncertain income tax positions 1,842sah_DeferredTaxAssetsInterestAndStateTaxes 1,910sah_DeferredTaxAssetsInterestAndStateTaxes
Other 792us-gaap_DeferredTaxAssetsOther 701us-gaap_DeferredTaxAssetsOther
Total deferred tax assets 53,777us-gaap_DeferredTaxAssetsNet 57,921us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:    
Basis difference in inventory (1,597)us-gaap_DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts (1,636)us-gaap_DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts
Basis difference in property and equipment (9,655)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (1,978)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Basis difference in goodwill (72,696)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill (57,028)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill
Other (3,861)us-gaap_DeferredTaxLiabilitiesOther (2,328)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liability (87,809)us-gaap_DeferredTaxLiabilities (62,970)us-gaap_DeferredTaxLiabilities
Valuation allowance (6,534)us-gaap_DeferredTaxAssetsValuationAllowance (6,758)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax asset (liability) $ (40,566)us-gaap_DeferredTaxAssetsLiabilitiesNet $ (11,807)us-gaap_DeferredTaxAssetsLiabilitiesNet