Summary Of Significant Accounting Policies (Policy)	12 Months Ended
Aug. 31, 2012
Summary Of Significant Accounting Policies [Abstract]
Operations	Operations Sonic Corp. (the "Company") operates and franchises a chain of quick-service restaurants in the United States. It derives its revenues primarily from Company Drive-In sales and royalty fees from franchisees. The Company also leases signs and real estate, and receives equity earnings in noncontrolling ownership in a number of Franchise Drive-Ins.
Principles Of Consolidation	Principles of Consolidation The accompanying financial statements include the accounts of the Company, its wholly owned subsidiaries and a number of Company Drive-Ins in which a subsidiary has a controlling ownership interest. All significant intercompany accounts and transactions have been eliminated.
Use Of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported and contingent assets and liabilities disclosed in the financial statements and accompanying notes. Actual results may differ from those estimates, and such differences may be material to the financial statements.
Reclassifications	Reclassifications Certain amounts reported in previous years, which are not material, have been combined and reclassified to conform to the current year presentation.
Cash Equivalents	Cash Equivalents Cash equivalents consist of highly liquid investments, primarily money market accounts that mature in three months or less from date of purchase, and depository accounts.
Restricted Cash	Restricted Cash As of August 31, 2012, the Company had restricted cash balances totaling $18.1 million for funds required to be held in trust for the benefit of senior noteholders under the Company's debt arrangements. The current portion of restricted cash of $10.2 million represents amounts to be returned to Sonic or paid to service current debt obligations. The noncurrent portion of $7.9 million represents interest reserves required to be set aside for the duration of the debt.
Accounts And Notes Receivable	Accounts and Notes Receivable The Company charges interest on past due accounts receivable and recognizes income as it is collected. Interest accrues on notes receivable based on the contractual terms of the respective note. The Company monitors all accounts and notes receivable for delinquency and provides for estimated losses for specific receivables that are not likely to be collected. The Company assesses credit risk for accounts and notes receivable of specific franchisees based on payment history, current payment patterns, the health of the franchisee's business, and an assessment of the franchisee's ability to pay outstanding balances. In addition to allowances for bad debt for specific franchisee receivables, a general provision for bad debt is estimated for the Company's accounts receivable based on historical trends. Account balances generally are charged against the allowance when the Company believes it is probable that the receivable will not be recovered and legal remedies have been exhausted. The Company continually reviews its allowance for doubtful accounts.
Inventories	Inventories Inventories consist principally of food and supplies that are carried at the lower of cost (first-in, first-out basis) or market.
Property, Equipment And Capital Leases	Property, Equipment and Capital Leases Property and equipment are recorded at cost, and leased assets under capital leases are recorded at the present value of future minimum lease payments. Depreciation of property and equipment and amortization of capital leases are computed by the straight-line method over the estimated useful lives or the lease term, including cancelable option periods when appropriate, and are combined for presentation in the financial statements.
Accounting For Long-Lived Assets	Accounting for Long-Lived Assets The Company reviews long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset might not be recoverable. Assets are grouped and evaluated for impairment at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other groups of assets, which generally represents the individual drive-in. The Company's primary test for an indicator of potential impairment is operating losses. If an indication of impairment is determined to be present, the Company estimates the future cash flows expected to be generated from the use of the asset and its eventual disposal. If the sum of undiscounted future cash flows is less than the carrying amount of the asset, an impairment loss is recognized. The impairment loss is measured by comparing the fair value of the asset to its carrying amount. Fair value is typically determined to be the value of the land, since drive-in buildings and improvements are single-purpose assets and have little value to market participants. The equipment associated with a store can be easily relocated to another store, and therefore is not adjusted. Surplus property assets are carried at the lower of depreciated cost or fair value less cost to sell. The majority of the value in surplus property is land. Fair values are estimated based upon appraisals or independent assessments of the assets' estimated sales values.
Goodwill And Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill is determined based on acquisition purchase price in excess of the fair value of identified assets. Intangible assets with lives restricted by contractual, legal, or other means are amortized over their useful lives. The Company tests all goodwill and other intangible assets not subject to amortization at least annually for impairment using the fair value approach on a reporting unit basis. The Company's reporting units are defined as Company Drive-Ins and Franchise Operations (see additional information regarding the Company's reporting units in note 13 -Segment Information). The accounting guidance requires a two-step process for testing impairment. We test for impairment using historical cash flows and other relevant facts and circumstances as the primary basis for our estimates of future cash flows. This process requires the use of estimates and assumptions, which are subject to a high degree of judgment. These impairment tests require us to estimate fair values of our drive-ins by making assumptions regarding future cash flows and other factors. We assess the recoverability of goodwill and other intangible assets related to our brand and drive-ins at least annually and more frequently if events or changes in circumstances occur indicating that the carrying amount of the asset may not be recoverable or as a result of allocating goodwill to Company Drive-Ins that are sold. Goodwill impairment testing first requires a comparison of the fair value of each reporting unit to the carrying value. The Company estimates fair value based on a comparison of two approaches: an income approach, using the discounted cash flow method, and a market approach, using the guideline public company method. The discounted estimates of future cash flows include significant management assumptions such as revenue growth rates, operating margins, capital expenditures, weighted average cost of capital, and future economic and market conditions. In addition, the market approach includes significant assumptions such as the use of projected cash flow and revenue multiples derived from a comparable set of public companies as well as a control premium based on recent market transactions. These assumptions are significant factors in calculating the value of the reporting units and can be affected by changes in consumer demand, commodity pricing, labor and other operating costs, our cost of capital and changes in guideline public company market multiples. If the carrying value of the reporting unit exceeds fair value, goodwill is considered impaired. The amount of the impairment is the difference between the carrying value of the goodwill and the "implied" fair value, which is calculated as if the reporting unit had just been acquired and accounted for as a business combination. The Company's intangible assets subject to amortization consist primarily of acquired franchise agreements, intellectual property, franchise fees, and other intangibles. Amortization expense is calculated using the straight-line method over the asset's expected useful life. See note 5 - Goodwill and Other Intangibles for additional disclosures related to goodwill and other intangibles.
Ownership Structure	Ownership Structure Company Drive-Ins are drive-in operations which are owned and operated by Sonic Restaurants, Inc., the Company's operating subsidiary. A typical Company Drive-In is operated by a manager, two to four assistant managers, and approximately 25 hourly employees, many of whom work part-time. The manager has responsibility for the day-to-day operations of the Company Drive-In. Supervisors oversee several Company Drive-Ins and supervise the managers of those Drive-Ins. The employee compensation program for Company Drive-Ins provides managers and supervisors a guaranteed base compensation with additional significant incentive compensation based on drive-in-level performance. Prior to April 2010, Company Drive-Ins operated as individual limited liability companies or general partnerships in which the manager and the supervisor for the respective drive-in owned a noncontrolling interest. Under this form of ownership, managers and supervisors shared in the cash flow for their Company Drive-Ins, but were also responsible for their share of any losses incurred by the drive-ins.
Refranchising Of Company Drive-Ins	Refranchising of Company Drive-Ins Gains and losses from the sale of Company Drive-Ins are recorded as other operating income (expense), net on the Consolidated Statements of Income. The Company may periodically refranchise other operations when circumstances warrant.
Revenue Recognition, Franchise Fees And Royalties	Revenue Recognition, Franchise Fees and Royalties Revenue from Company Drive-In sales is recognized when food and beverage products are sold. Company Drive-In sales are presented net of sales tax and other sales-related taxes. Initial franchise fees are recognized in income when the Company has substantially performed or satisfied all material services or conditions relating to the sale of the franchise and the fees are nonrefundable. Area development fees are nonrefundable and are recognized in income on a pro-rata basis when the conditions for revenue recognition under the individual area development agreements are met. Both initial franchise fees and area development fees are generally recognized upon the opening of a Franchise Drive-In or upon termination of the agreement between the Company and the franchisee. The Company's franchisees are required under the provisions of the license agreements to pay the Company royalties each month based on a percentage of actual sales. However, the royalty payments and supporting financial statements are not due until the following month under the terms of the franchise agreements. As a result, the Company accrues royalty revenue in the month earned.
Operating Leases	Operating Leases Rent expense is recognized on a straight-line basis over the expected lease term, including cancelable option periods when it is deemed to be reasonably assured that the Company would incur an economic penalty for not exercising the options. Within the terms of some of our leases, there are rent holidays and/or escalations in payments over the base lease term, as well as renewal periods. The effects of the holidays and escalations have been reflected in rent expense on a straight-line basis over the expected lease term, which includes cancelable option periods when appropriate. The lease term commences on the date when the Company has the right to control the use of the leased property, which can occur before rent payments are due under the terms of the lease. Contingent rent is generally based on sales levels and is accrued at the point in time it is probable that such sales levels will be achieved.
Advertising Costs	Advertising Costs Costs incurred in connection with the advertising and promoting of the Company's products are included in other operating expenses and are expensed as incurred. Such costs amounted to $22.6 million in fiscal year 2012 and $22.5 million in both fiscal year 2011 and 2010. Under the Company's franchise agreements, both Company Drive-Ins and Franchise Drive-Ins must contribute a minimum percentage of revenues to a national media production fund (Sonic Brand Fund) and spend an additional minimum percentage of gross revenues on local advertising, either directly or through Company-required participation in advertising cooperatives. A portion of the local advertising contributions is redistributed to a System Marketing Fund, which purchases advertising on national cable and broadcast networks and funds other national media expenses and sponsorship opportunities. As stated in the terms of existing franchise agreements, these funds do not constitute assets of the Company, and the Company acts with limited agency in the administration of these funds. Accordingly, neither the revenues and expenses nor the assets and liabilities of the advertising cooperatives, the Sonic Brand Fund, or the System Marketing Fund are included in the Company's consolidated financial statements. However, all advertising contributions by Company Drive-Ins are recorded as expense on the Company's financial statements.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense on a straight-line basis over the requisite service period of the award (generally the vesting period of the grant) or to an employee's eligible retirement date, if earlier. The Company grants incentive stock options ("ISOs"), non-qualified stock options ("NQs") and restricted stock units ("RSUs"). For grants of NQs and RSUs, the Company expects to recognize a tax benefit upon exercise of the option or vesting of the RSU. As a result, a tax benefit is recognized on the related stock-based compensation expense for these types of awards. For grants of ISOs, a tax benefit only results if the option holder has a disqualifying disposition. As a result of the limitation on the tax benefit for ISOs, the tax benefit for stock-based compensation will generally be less than the Company's overall tax rate and will vary depending on the timing of employees' exercises and sales of stock. For additional information on stock-based compensation see note 12 -Stockholders' Equity.
Income Taxes	Income Taxes Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities from a change in tax rates is recognized in income in the period that includes the enactment date. Income tax benefits credited to equity relate to tax benefits associated with amounts that are deductible for income tax purposes but do not affect earnings. These benefits are principally generated from employee exercises of non-qualified stock options, the vesting of RSUs, and disqualifying dispositions of ISOs. The threshold for recognizing the financial statement effects of a tax position is when it is more likely than not, based on the technical merits, that the position will be sustained upon examination by a taxing authority. Recognized tax positions are initially and subsequently measured as the largest amount of tax benefit that is more likely than not to be realized upon ultimate settlement with a taxing authority. Liabilities for unrecognized tax benefits related to such tax positions are included in other long-term liabilities unless the tax position is expected to be settled within the upcoming year, in which case the liabilities are included in accrued expenses and other current liabilities. Interest and penalties related to unrecognized tax benefits are included in income tax expense. Additional information regarding the Company's unrecognized tax benefits is provided in note 11 - Income Taxes
Fair Value Of Measurements	Fair Value Measurements The Company's financial assets and liabilities consist of cash and cash equivalents, accounts and notes receivable, accounts payable and long-term debt. The fair value of cash and cash equivalents, accounts receivable, and accounts payable approximates their carrying amounts due to the short term nature of these assets and liabilities. The following methods and assumptions were used by the Company in estimating fair values of its financial instruments: Notes receivable - For variable rate loans with no significant change in credit risk since the loan origination, fair values approximate carrying amounts. Fair values for fixed-rate loans are estimated using discounted cash flow analysis, using interest rates that would currently be offered for loans with similar terms to borrowers of similar credit quality and/or the same remaining maturities. As of August 31, 2012 and 2011, the fair value of the Company's fixed-rate loans approximated their carrying value. Long-term debt - The Company prepares a discounted cash flow analysis for its fixed rate borrowings to estimate fair value each quarter. This analysis uses Level 2 inputs from market information available for public debt transactions for companies with ratings that are similar to the Company's ratings and from information gathered from brokers who trade in the Company's notes. The fair value estimate required significant assumptions by management. Management believes this fair value is a reasonable estimate. For more information regarding the Company's long-term debt, see note 9 - Debt and note 10 - Fair Value of Financial Instruments. Certain nonfinancial assets and liabilities are measured at fair value on a nonrecurring basis, which means these assets and liabilities are not measured at fair value on an ongoing basis but are subject to periodic impairment tests. For the Company, these items primarily include long-lived assets, goodwill and other intangible assets. Refer to sections "Accounting for Long-Lived Assets" and "Goodwill and Other Intangible Assets," discussed above, for inputs and valuation techniques used to measure the fair value of these nonfinancial assets. The fair value was based upon management's assessment as well as appraisals or independent assessments which involved Level 2 and Level 3 inputs.
Noncontrolling Interests	Noncontrolling Interests Effective September 1, 2009, the Company implemented Accounting Standards Codification, ("ASC") Topic 810, "Consolidation," which requires noncontrolling interests, previously called minority interests, to be presented as a separate item in the equity section of the consolidated balance sheets. It also requires the amount of consolidated net income related to noncontrolling interests to be clearly presented on the face of the consolidated statements of income. Effective April 1, 2010, the Company revised its compensation program at the Company Drive-In level. As a result of these changes, noncontrolling interests are immaterial for fiscal years 2012 and 2011 and have been included in "payroll and other employee benefits" on the Consolidated Statements of Income and in "other noncurrent liabilities" on the Consolidated Balance Sheets.
New Accounting Pronouncements	New Accounting Pronouncements In September 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-08, "Testing Goodwill for Impairment." This pronouncement was issued to simplify how entities test goodwill for impairment. Under this pronouncement, entities may first assess qualitative factors to determine whether it is necessary to perform the two-step goodwill impairment test. If the qualitative assessment results in a more than 50% likely result that the fair value of a reporting unit is less than the carrying amount, then the entity must continue to apply the two-step impairment test. If the entity concludes the fair value exceeds the carrying amount, then neither of the two steps in the goodwill impairment test is required. This pronouncement is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011 with early adoption permitted. The adoption of this pronouncement is not expected to have a material impact on the Company's consolidated financial statements. In July 2012, the FASB issued ASU No. 2012-02, "Testing Indefinite-Lived Intangible Assets for Impairment." This pronouncement was issued to simplify how entities test for impairment of indefinite-lived intangible assets. Under this pronouncement, an entity has the option first to assess qualitative factors to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired. In conclusion of this assessment, if an entity finds that it is not more likely than not that an indefinite-lived intangible asset is impaired, then the entity is not required to take further action. However, if an entity concludes otherwise, then it is required to determine the fair value of the indefinite-lived intangible asset and perform the quantitative impairment test by comparing the fair value with the carrying amount in accordance with ASC Topic 350, "Intangibles – Goodwill and Other." This pronouncement is effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012 with early adoption permitted. The adoption of this pronouncement is not expected to have a material impact on the Company's consolidated financial statements.

Summary Of Significant Accounting Policies (Policy)

12 Months Ended

Aug. 31, 2012

Summary Of Significant Accounting Policies [Abstract]

Operations

Sonic Corp. (the "Company") operates and franchises a chain of quick-service restaurants in the United States. It derives its revenues primarily from Company Drive-In sales and royalty fees from franchisees. The Company also leases signs and real estate, and receives equity earnings in noncontrolling ownership in a number of Franchise Drive-Ins.

Principles Of Consolidation

Principles of Consolidation

The accompanying financial statements include the accounts of the Company, its wholly owned subsidiaries and a number of Company Drive-Ins in which a subsidiary has a controlling ownership interest. All significant intercompany accounts and transactions have been eliminated.

Use Of Estimates

Use of Estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported and contingent assets and liabilities disclosed in the financial statements and accompanying notes. Actual results may differ from those estimates, and such differences may be material to the financial statements.

Reclassifications

Reclassifications

Certain amounts reported in previous years, which are not material, have been combined and reclassified to conform to the current year presentation.

Cash Equivalents

Cash Equivalents

Cash equivalents consist of highly liquid investments, primarily money market accounts that mature in three months or less from date of purchase, and depository accounts.

Restricted Cash

Restricted Cash

As of August 31, 2012, the Company had restricted cash balances totaling $18.1 million for funds required to be held in trust for the benefit of senior noteholders under the Company's debt arrangements. The current portion of restricted cash of $10.2 million represents amounts to be returned to Sonic or paid to service current debt obligations. The noncurrent portion of $7.9 million represents interest reserves required to be set aside for the duration of the debt.

Accounts And Notes Receivable

Accounts and Notes Receivable

The Company charges interest on past due accounts receivable and recognizes income as it is collected. Interest accrues on notes receivable based on the contractual terms of the respective note. The Company monitors all accounts and notes receivable for delinquency and provides for estimated losses for specific receivables that are not likely to be collected. The Company assesses credit risk for accounts and notes receivable of specific franchisees based on payment history, current payment patterns, the health of the franchisee's business, and an assessment of the franchisee's ability to pay outstanding balances. In addition to allowances for bad debt for specific franchisee receivables, a general provision for bad debt is estimated for the Company's accounts receivable based on historical trends. Account balances generally are charged against the allowance when the Company believes it is probable that the receivable will not be recovered and legal remedies have been exhausted. The Company continually reviews its allowance for doubtful accounts.

Inventories

Inventories

Inventories consist principally of food and supplies that are carried at the lower of cost (first-in, first-out basis) or market.

Property, Equipment And Capital Leases

Property, Equipment and Capital Leases

Property and equipment are recorded at cost, and leased assets under capital leases are recorded at the present value of future minimum lease payments. Depreciation of property and equipment and amortization of capital leases are computed by the straight-line method over the estimated useful lives or the lease term, including cancelable option periods when appropriate, and are combined for presentation in the financial statements.

Accounting For Long-Lived Assets

Accounting for Long-Lived Assets

The Company reviews long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset might not be recoverable. Assets are grouped and evaluated for impairment at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other groups of assets, which generally represents the individual drive-in. The Company's primary test for an indicator of potential impairment is operating losses. If an indication of impairment is determined to be present, the Company estimates the future cash flows expected to be generated from the use of the asset and its eventual disposal. If the sum of undiscounted future cash flows is less than the carrying amount of the asset, an impairment loss is recognized. The impairment loss is measured by comparing the fair value of the asset to its carrying amount. Fair value is typically determined to be the value of the land, since drive-in buildings and improvements are single-purpose assets and have little value to market participants. The equipment associated with a store can be easily relocated to another store, and therefore is not adjusted.

Surplus property assets are carried at the lower of depreciated cost or fair value less cost to sell. The majority of the value in surplus property is land. Fair values are estimated based upon appraisals or independent assessments of the assets' estimated sales values.

Goodwill And Other Intangible Assets

Goodwill and Other Intangible Assets

Goodwill is determined based on acquisition purchase price in excess of the fair value of identified assets. Intangible assets with lives restricted by contractual, legal, or other means are amortized over their useful lives. The Company tests all goodwill and other intangible assets not subject to amortization at least annually for impairment using the fair value approach on a reporting unit basis. The Company's reporting units are defined as Company Drive-Ins and Franchise Operations (see additional information regarding the Company's reporting units in note 13 -Segment Information). The accounting guidance requires a two-step process for testing impairment. We test for impairment using historical cash flows and other relevant facts and circumstances as the primary basis for our estimates of future cash flows. This process requires the use of estimates and assumptions, which are subject to a high degree of judgment. These impairment tests require us to estimate fair values of our drive-ins by making assumptions regarding future cash flows and other factors.

We assess the recoverability of goodwill and other intangible assets related to our brand and drive-ins at least annually and more frequently if events or changes in circumstances occur indicating that the carrying amount of the asset may not be recoverable or as a result of allocating goodwill to Company Drive-Ins that are sold. Goodwill impairment testing first requires a comparison of the fair value of each reporting unit to the carrying value. The Company estimates fair value based on a comparison of two approaches: an income approach, using the discounted cash flow method, and a market approach, using the guideline public company method. The discounted estimates of future cash flows include significant management assumptions such as revenue growth rates, operating margins, capital expenditures, weighted average cost of capital, and future economic and market conditions. In addition, the market approach includes significant assumptions such as the use of projected cash flow and revenue multiples derived from a comparable set of public companies as well as a control premium based on recent market transactions. These assumptions are significant factors in calculating the value of the reporting units and can be affected by changes in consumer demand, commodity pricing, labor and other operating costs, our cost of capital and changes in guideline public company market multiples. If the carrying value of the reporting unit exceeds fair value, goodwill is considered impaired. The amount of the impairment is the difference between the carrying value of the goodwill and the "implied" fair value, which is calculated as if the reporting unit had just been acquired and accounted for as a business combination.

The Company's intangible assets subject to amortization consist primarily of acquired franchise agreements, intellectual property, franchise fees, and other intangibles. Amortization expense is calculated using the straight-line method over the asset's expected useful life. See note 5 - Goodwill and Other Intangibles for additional disclosures related to goodwill and other intangibles.

Ownership Structure

Ownership Structure

Company Drive-Ins are drive-in operations which are owned and operated by Sonic Restaurants, Inc., the Company's operating subsidiary. A typical Company Drive-In is operated by a manager, two to four assistant managers, and approximately 25 hourly employees, many of whom work part-time. The manager has responsibility for the day-to-day operations of the Company Drive-In. Supervisors oversee several Company Drive-Ins and supervise the managers of those Drive-Ins. The employee compensation program for Company Drive-Ins provides managers and supervisors a guaranteed base compensation with additional significant incentive compensation based on drive-in-level performance. Prior to April 2010, Company Drive-Ins operated as individual limited liability companies or general partnerships in which the manager and the supervisor for the respective drive-in owned a noncontrolling interest. Under this form of ownership, managers and supervisors shared in the cash flow for their Company Drive-Ins, but were also responsible for their share of any losses incurred by the drive-ins.

Refranchising Of Company Drive-Ins

Refranchising of Company Drive-Ins

Gains and losses from the sale of Company Drive-Ins are recorded as other operating income (expense), net on the Consolidated Statements of Income. The Company may periodically refranchise other operations when circumstances warrant.

Revenue Recognition, Franchise Fees And Royalties

Revenue Recognition, Franchise Fees and Royalties

Revenue from Company Drive-In sales is recognized when food and beverage products are sold. Company Drive-In sales are presented net of sales tax and other sales-related taxes.

Initial franchise fees are recognized in income when the Company has substantially performed or satisfied all material services or conditions relating to the sale of the franchise and the fees are nonrefundable. Area development fees are nonrefundable and are recognized in income on a pro-rata basis when the conditions for revenue recognition under the individual area development agreements are met. Both initial franchise fees and area development fees are generally recognized upon the opening of a Franchise Drive-In or upon termination of the agreement between the Company and the franchisee.

The Company's franchisees are required under the provisions of the license agreements to pay the Company royalties each month based on a percentage of actual sales. However, the royalty payments and supporting financial statements are not due until the following month under the terms of the franchise agreements. As a result, the Company accrues royalty revenue in the month earned.

Operating Leases

Operating Leases

Rent expense is recognized on a straight-line basis over the expected lease term, including cancelable option periods when it is deemed to be reasonably assured that the Company would incur an economic penalty for not exercising the options. Within the terms of some of our leases, there are rent holidays and/or escalations in payments over the base lease term, as well as renewal periods. The effects of the holidays and escalations have been reflected in rent expense on a straight-line basis over the expected lease term, which includes cancelable option periods when appropriate. The lease term commences on the date when the Company has the right to control the use of the leased property, which can occur before rent payments are due under the terms of the lease. Contingent rent is generally based on sales levels and is accrued at the point in time it is probable that such sales levels will be achieved.

Advertising Costs

Advertising Costs

Costs incurred in connection with the advertising and promoting of the Company's products are included in other operating expenses and are expensed as incurred. Such costs amounted to $22.6 million in fiscal year 2012 and $22.5 million in both fiscal year 2011 and 2010.

Under the Company's franchise agreements, both Company Drive-Ins and Franchise Drive-Ins must contribute a minimum percentage of revenues to a national media production fund (Sonic Brand Fund) and spend an additional minimum percentage of gross revenues on local advertising, either directly or through Company-required participation in advertising cooperatives. A portion of the local advertising contributions is redistributed to a System Marketing Fund, which purchases advertising on national cable and broadcast networks and funds other national media expenses and sponsorship opportunities. As stated in the terms of existing franchise agreements, these funds do not constitute assets of the Company, and the Company acts with limited agency in the administration of these funds. Accordingly, neither the revenues and expenses nor the assets and liabilities of the advertising cooperatives, the Sonic Brand Fund, or the System Marketing Fund are included in the Company's consolidated financial statements. However, all advertising contributions by Company Drive-Ins are recorded as expense on the Company's financial statements.

Stock-Based Compensation

Stock-Based Compensation

Stock-based compensation is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense on a straight-line basis over the requisite service period of the award (generally the vesting period of the grant) or to an employee's eligible retirement date, if earlier.

The Company grants incentive stock options ("ISOs"), non-qualified stock options ("NQs") and restricted stock units ("RSUs"). For grants of NQs and RSUs, the Company expects to recognize a tax benefit upon exercise of the option or vesting of the RSU. As a result, a tax benefit is recognized on the related stock-based compensation expense for these types of awards. For grants of ISOs, a tax benefit only results if the option holder has a disqualifying disposition. As a result of the limitation on the tax benefit for ISOs, the tax benefit for stock-based compensation will generally be less than the Company's overall tax rate and will vary depending on the timing of employees' exercises and sales of stock. For additional information on stock-based compensation see note 12 -Stockholders' Equity.

Income Taxes

Income Taxes

Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities from a change in tax rates is recognized in income in the period that includes the enactment date.

Income tax benefits credited to equity relate to tax benefits associated with amounts that are deductible for income tax purposes but do not affect earnings. These benefits are principally generated from employee exercises of non-qualified stock options, the vesting of RSUs, and disqualifying dispositions of ISOs.

The threshold for recognizing the financial statement effects of a tax position is when it is more likely than not, based on the technical merits, that the position will be sustained upon examination by a taxing authority. Recognized tax positions are initially and subsequently measured as the largest amount of tax benefit that is more likely than not to be realized upon ultimate settlement with a taxing authority. Liabilities for unrecognized tax benefits related to such tax positions are included in other long-term liabilities unless the tax position is expected to be settled within the upcoming year, in which case the liabilities are included in accrued expenses and other current liabilities. Interest and penalties related to unrecognized tax benefits are included in income tax expense.

Additional information regarding the Company's unrecognized tax benefits is provided in note 11 - Income Taxes

Fair Value Of Measurements

Fair Value Measurements

The Company's financial assets and liabilities consist of cash and cash equivalents, accounts and notes receivable, accounts payable and long-term debt. The fair value of cash and cash equivalents, accounts receivable, and accounts payable approximates their carrying amounts due to the short term nature of these assets and liabilities.

The following methods and assumptions were used by the Company in estimating fair values of its financial instruments:

Notes receivable - For variable rate loans with no significant change in credit risk since the loan origination, fair values approximate carrying amounts. Fair values for fixed-rate loans are estimated using discounted cash flow analysis, using interest rates that would currently be offered for loans with similar terms to borrowers of similar credit quality and/or the same remaining maturities. As of August 31, 2012 and 2011, the fair value of the Company's fixed-rate loans approximated their carrying value.
Long-term debt - The Company prepares a discounted cash flow analysis for its fixed rate borrowings to estimate fair value each quarter. This analysis uses Level 2 inputs from market information available for public debt transactions for companies with ratings that are similar to the Company's ratings and from information gathered from brokers who trade in the Company's notes. The fair value estimate required significant assumptions by management. Management believes this fair value is a reasonable estimate. For more information regarding the Company's long-term debt, see note 9 - Debt and note 10 - Fair Value of Financial Instruments.

Certain nonfinancial assets and liabilities are measured at fair value on a nonrecurring basis, which means these assets and liabilities are not measured at fair value on an ongoing basis but are subject to periodic impairment tests. For the Company, these items primarily include long-lived assets, goodwill and other intangible assets. Refer to sections "Accounting for Long-Lived Assets" and "Goodwill and Other Intangible Assets," discussed above, for inputs and valuation techniques used to measure the fair value of these nonfinancial assets. The fair value was based upon management's assessment as well as appraisals or independent assessments which involved Level 2 and Level 3 inputs.

Noncontrolling Interests

Noncontrolling Interests

Effective September 1, 2009, the Company implemented Accounting Standards Codification, ("ASC") Topic 810, "Consolidation," which requires noncontrolling interests, previously called minority interests, to be presented as a separate item in the equity section of the consolidated balance sheets. It also requires the amount of consolidated net income related to noncontrolling interests to be clearly presented on the face of the consolidated statements of income. Effective April 1, 2010, the Company revised its compensation program at the Company Drive-In level. As a result of these changes, noncontrolling interests are immaterial for fiscal years 2012 and 2011 and have been included in "payroll and other employee benefits" on the Consolidated Statements of Income and in "other noncurrent liabilities" on the Consolidated Balance Sheets.

New Accounting Pronouncements

New Accounting Pronouncements

In September 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-08, "Testing Goodwill for Impairment." This pronouncement was issued to simplify how entities test goodwill for impairment. Under this pronouncement, entities may first assess qualitative factors to determine whether it is necessary to perform the two-step goodwill impairment test. If the qualitative assessment results in a more than 50% likely result that the fair value of a reporting unit is less than the carrying amount, then the entity must continue to apply the two-step impairment test. If the entity concludes the fair value exceeds the carrying amount, then neither of the two steps in the goodwill impairment test is required. This pronouncement is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011 with early adoption permitted. The adoption of this pronouncement is not expected to have a material impact on the Company's consolidated financial statements.

In July 2012, the FASB issued ASU No. 2012-02, "Testing Indefinite-Lived Intangible Assets for Impairment." This pronouncement was issued to simplify how entities test for impairment of indefinite-lived intangible assets. Under this pronouncement, an entity has the option first to assess qualitative factors to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired. In conclusion of this assessment, if an entity finds that it is not more likely than not that an indefinite-lived intangible asset is impaired, then the entity is not required to take further action. However, if an entity concludes otherwise, then it is required to determine the fair value of the indefinite-lived intangible asset and perform the quantitative impairment test by comparing the fair value with the carrying amount in accordance with ASC Topic 350, "Intangibles – Goodwill and Other." This pronouncement is effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012 with early adoption permitted. The adoption of this pronouncement is not expected to have a material impact on the Company's consolidated financial statements.