Long-Term Debt - Financial Covenants Include Required Specified Ratios (Detail)	Dec. 31, 2013
Debt Disclosure [Abstract]
Required Minimum Consolidated Liquidity Ratio	1.05
Required Minimum Consolidated Fixed Charge Coverage Ratio	1.20
Required Maximum Consolidated Total Lease Adjusted Leverage Ratio	5.50
Actual Minimum Consolidated Liquidity Ratio	1.16
Actual Minimum Consolidated Fixed Charge Coverage Ratio	1.83
Actual Maximum Consolidated Total Lease Adjusted Leverage Ratio	3.96

Sonic's actual consolidated lease adjusted leverage ratio calculated as of the period-end date. It is defined as such: "Consolidated Total Lease Adjusted Leverage Ratio" means, as of any date of determination, the ratio of (a) (i) Consolidated Total Outstanding Indebtedness (excluding (w) Indebtedness under the New Vehicle Floorplan Facility, (x) Permitted Silo Indebtedness for New Vehicle or Used Vehicle inventory, (y) Indebtedness under the Used Vehicle Floorplan Facility and (z) Temporary Indebtedness) as of such date plus (ii) eight (8) times Consolidated Rental Expense for the period of four fiscal quarters most recently ended (excluding Consolidated Rental Expense relating to any real property acquired during the period of four fiscal quarters most recently ended but including as Consolidated Rental Expense the "rental payments" for any real property Disposed of and leased back to the Company or its Subsidiaries during the period of four fiscal quarters most recently ended as if such sale-leaseback transaction had occurred on and such "rental payments" began on the first day of such applicable four fiscal quarter period) to (b) Consolidated EBITDAR for the period of four fiscal quarters most recently ended.

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Covenant in the 2011 Credit Facilities that requires a minimum ratio defined as such: "Consolidated Total Lease Adjusted Leverage Ratio" means, as of any date of determination, the ratio of (a) (i) Consolidated Total Outstanding Indebtedness (excluding (w) Indebtedness under the New Vehicle Floorplan Facility, (x) Permitted Silo Indebtedness for New Vehicle or Used Vehicle inventory, (y) Indebtedness under the Used Vehicle Floorplan Facility and (z) Temporary Indebtedness) as of such date plus (ii) eight (8) times Consolidated Rental Expense for the period of four fiscal quarters most recently ended (excluding Consolidated Rental Expense relating to any real property acquired during the period of four fiscal quarters most recently ended but including as Consolidated Rental Expense the "rental payments" for any real property Disposed of and leased back to the Company or its Subsidiaries during the period of four fiscal quarters most recently ended as if such sale-leaseback transaction had occurred on and such "rental payments" began on the first day of such applicable four fiscal quarter period) to (b) Consolidated EBITDAR for the period of four fiscal quarters most recently ended.

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