Company restaurants Company Restaurants [Member] Company Restaurants [Member] Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Long-term receivables, net of allowance of $5,503 (2021) and $7,999 (2020) Financing Receivable, after Allowance for Credit Loss, Noncurrent Letter of Credit Letter of Credit [Member] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Released (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Risks and Uncertainties Unusual Risks and Uncertainties [Policy Text Block] Unusual Risks and Uncertainties [Policy Text Block] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Emerging Growth Company Entity Emerging Growth Company Operating lease right-of-use assets Operating Lease, Right-of-Use Asset 2019 Class A-2 Notes 2019 Class A-2-I And 2019 Class A-2-II Notes [Member] 2019 Class A-2-I And 2019 Class A-2-II Notes Thereafter Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, After Year Four Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, After Year Four Number of restaurants (restaurant) Number of Restaurants Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Accrued employee compensation and benefits Employee-related Liabilities, Current Statistical Measurement [Domain] Statistical Measurement [Domain] Receivable Type [Axis] Receivable Type [Axis] Entity Address, Address Line One Entity Address, Address Line One Forfeited (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Schedule of Future Minimum Payments as a Lessor Under Direct Financing Leases Lessor, Direct Financing Leases Table [Table Text Block] Lessor, Direct Financing Leases Table Number of restaurants impacted by long-lived asset impairment Number Of Restaurants Impacted By Long-lived Asset Impairment Number Of Restaurants Impacted By Long-lived Asset Impairment Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Schedule of Changes in Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Additional paid-in-capital Additional Paid in Capital, Common Stock Entity Filer Category Entity Filer Category Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Receivables, allowance for credit loss Financing Receivable, Allowance for Credit Loss, Current Other non-current assets, net Other Assets, Noncurrent Receivables, net of allowance of $10,095 (2021) and $15,057 (2020) Financing Receivable, after Allowance for Credit Loss, Current Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Segments [Axis] Segments [Axis] Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Total operating lease income Operating Lease, Lease Income Schedule of Operating Lease Income Operating Lease, Lease Income [Table Text Block] Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Closure charges Business Exit Costs Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II 2019 Class A-2-II Notes Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II [Member] Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II [Member] Franchisor Disclosure [Line Items] Franchisor Disclosure [Line Items] Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (Gain) loss on disposition of assets Gain (Loss) on Disposition of Assets Document Fiscal Year Focus Document Fiscal Year Focus Applebee's advertising funds Held for Advertising Activity Deposits [Member] Held for Advertising Activity Deposits [Member] Accounts Receivable Accounts Receivable Portfolio Segment [Member] Accounts Receivable Portfolio Segment [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and 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(credit) expense for the six months ended June 30, 2021 Financing Receivable, Credit Loss, Expense (Reversal) Granted (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Details of Impairment of Long-Lived Assets Held and Used by Asset Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Award Type [Domain] Award Type [Domain] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Other Other Receivables [Member] Other Receivables Credit Facility [Domain] Credit Facility [Domain] Assets: Assets [Abstract] Impairment for goodwill and intangible assets Goodwill and Intangible Asset Impairment Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Vested and expected to vest (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price DSCR less than 1.75x - Cash Flow Sweeping Event Debt Service Coverage Ratio, Cash Sweeping Event Debt Service Coverage Ratio, Cash Sweeping Event 2017 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Impairment and Closure Charges Goodwill and Intangible Assets Disclosure [Text Block] Preferred stock, $1 par value, 10,000,000 shares authorized; no shares issued or outstanding Preferred Stock, Value, Issued Outstanding, beginning of period (in shares) Outstanding, end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Entity Address, City or Town Entity Address, City or Town Tradename Trade Names [Member] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] Number of properties leased Lessor, Number of Properties Leased Lessor, Number of Properties Leased Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Financing obligations, less current maturities Sale Leaseback Financing Obligations The sale leaseback financing obligations due after one year from the balance sheet date or beyond the operating cycle, if longer, accounted for under the financing method. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Equity classified awards expense Allocated Share-based Compensation Expense, Equity Classified Awards Allocated Share-based Compensation Expense, Equity Classified Awards Weighted average interest rate, over time Long-term Debt, Weighted Average Interest Rate, over Time Balance, December 31, 2020 Balance, June 30, 2021 Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Notes Receivable Notes Receivable Portfolio Segment [Member] Notes Receivable Portfolio Segment [Member] Less: unearned income Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount Secured Debt Secured Debt [Member] Make-whole premium Debt Instrument, Make-Whole Premium Debt Instrument, Make-Whole Premium 2025 Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four Schedule of Lease Payments Leases, Supplemental Cash Flow Information [Table Text Block] Leases, Supplemental Cash Flow Information [Table Text Block] Royalties, franchise fees and other Franchisor - Royalties, franchise fees, and other [Member] Franchisor - Royalties, franchise fees, and other [Member] LTIP Long Term Incentive Plan [Member] Long Term Incentive Plan [Member] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other current assets Increase (Decrease) in Other Current Assets Principal payments on finance lease obligations Principal payments on finance lease obligations Finance Lease, Principal Payments Entity Interactive Data Current Entity Interactive Data Current Number of operating segments (segment) Number of Operating Segments Basic (USD per share) Net income per common share - basic (USD per 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Series 2019-1 4.194% Fixed Rate Senior Secured Notes, Class A-2-I [Member] 90-119 days Financial Asset, 90 to 119 Days Past Due [Member] Financial Asset, 90 to 119 Days Past Due [Member] Interest expense, net Interest Expense, Debt Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Restricted Stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Entity Current Reporting Status Entity Current Reporting Status Cumulative Effect, Period Of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Tax payments for share settlement of restricted stock units Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Payments on operating leases Operating Lease, Payments Impairment and closure charges Total impairment and closure charges Restructuring Costs and 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Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Goodwill impairment Goodwill, Impairment Loss Other Other Operating Activities, Cash Flow Statement Document Transition Report Document Transition Report Schedule of Delinquency Status of Receivable Financing Receivable, Past Due [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Base Rate Base Rate [Member] Schedule of Changes in Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Franchisor Disclosure [Axis] Franchisor Disclosure [Axis] Total liabilities and stockholders’ deficit Liabilities and Equity Long-term investment in direct financing leases Net Investment in Lease, before Allowance for Credit Loss, Noncurrent 2020 Financing Receivable, Excluding Accrued 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("CECL") Credit Loss, Financial Instrument [Text Block] Accounting Policies [Abstract] Weighted average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Number of reportable segments (segment) Number of Reportable Segments 2025 Lessor, Operating Lease, Payment to be Received, Year Four Cost of revenues: Cost of Revenue [Abstract] Letters of credit outstanding, amount Letters of Credit Outstanding, Amount Total obligations Operating Lease, Liability Multiplier for target award based on total shareholder return on common stock (percent) Share Based Compensation, Multiplier for Target Award Based on Total Shareholder Return on Common Stock Share Based Compensation, Multiplier for Target Award Based on Total Shareholder Return on Common Stock Rental revenues Rental Income Rental income includes revenue from operating leases and interest income from direct financing leases. Common stock, $0.01 par value; shares: 40,000,000 authorized; June 30, 2021 - 25,011,253 issued, 17,177,950 outstanding; December 31, 2020 - 24,882,122 issued, 16,452,174 outstanding Common Stock, Value, Issued Finance lease, weighted average discount rate, percent Finance Lease, Weighted Average Discount Rate, Percent Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revision of Prior Period, Accounting Standards Update, Adjustment Revision of Prior Period, Accounting Standards Update, Adjustment [Member] Total compensation cost not yet recognized, period for recognition (in years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Beginning balance (USD per share) Ending balance (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Current Financial Asset, Not Past Due [Member] Commitments and contingencies Commitments and Contingencies Lease Disclosures Lessee, Operating Leases [Text Block] Advertising revenues Franchisor - Advertising Revenue [Member] Franchisor - Advertising Revenue [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Fair Value of Non-Current Financial Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Class of Treasury Stock [Table] Class of Treasury Stock [Table] Annual principal payment Debt Instrument, Annual Principal Payment 2021 (remaining six months) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Other Financing Receivable, Allowance for Credit Loss, Other Financing Receivable, Allowance for Credit Loss, Other Restricted Stock Restricted Stock [Member] Schedule of Stock Option Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Percentage of restaurants operating at full capacity Percentage Of Restaurants Operating At Full Capacity Percentage Of Restaurants Operating At Full Capacity Document Period End Date Document Period End Date Dilutive effect of stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Quarterly principal payment Debt Instrument, Periodic Payment, Principal Goodwill [Line Items] Goodwill [Line Items] Federal Funds Rate Federal Funds Rate [Member] Federal Funds Rate [Member] Entity Registrant Name Entity Registrant Name IHOP advertising funds and gift card programs Advertising Funds and Gift Card Program [Member] Advertising Funds and Gift Card Program Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Numerator for basic and diluted income (loss) per common share: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Treasury stock, shares (in shares) Treasury stock, beginning balance (in shares) Treasury stock, ending balance (in shares) Treasury Stock, Shares Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Less: interest/imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Maximum amount outstanding during period Line of Credit Facility, Maximum Amount Outstanding During Period Less: current portion Net Investment in Lease, before Allowance for Credit Loss, Current Dividends declared per common share (USD per share) Common Stock, Dividends, Per Share, Declared Lessor, number of leases requiring additional rent payments based on a percentage of restaurant sales Lessor, Number of Leases Requiring Additional Rent Payments Based On A Percentage Of Restaurant Sales Lessor, Number of Leases Requiring Additional Rent Payments Based On A Percentage Of Restaurant Sales Gift card liability Accrued Liabilities, Current Revenue from contract with customer Total franchise revenue Revenue from Contract with Customer, Excluding Assessed Tax Current income tax receivables and payables Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Expected change in unrecognized tax benefits Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Cash-Settled Restricted Stock Units Cash-settled Restricted Stock Units [Member] Cash-settled Restricted Stock Units [Member] Less: interest/imputed interest Finance Lease, Liability, Undiscounted Excess Amount Net income (loss) available to common stockholders: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Dividends Declared Dividends Declared [Table Text Block] Stock Options Share-based Payment Arrangement, Option [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Face Value of Class A-2 Notes Reported Value Measurement [Member] Consolidation Items [Domain] Consolidation Items [Domain] Equity [Abstract] Equity [Abstract] Thereafter Finance Lease, Liability, To Be Paid, After Year Four Finance Lease, Liability, To Be Paid, After Year Four Common Stock Common Stock [Member] Variable Rate [Axis] Variable Rate [Axis] Segments Segment Reporting Disclosure [Text Block] Finance lease, weighted average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Current maturities of operating lease obligations Less: current portion Operating Lease, Liability, Current Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Reissuance of treasury stock Stock Issued During Period, Value, Treasury Stock Reissued Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Non-cash stock-based compensation expense Share-based Payment Arrangement, Noncash 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Ten Year United States Treasury Bill Rate [Member] Ten Year United States Treasury Bill Rate [Member] Total liabilities Liabilities Long-term receivables Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent Legal Entity [Axis] Legal Entity [Axis] Potential liability for guaranteed leases excluding unexercised option periods Guarantor Obligations, Maximum Exposure, Excluding Unexercised Option Periods, Undiscounted Guarantor Obligations, Maximum Exposure, Excluding Unexercised Option Periods, Undiscounted Accrued penalties on income taxes, less than Unrecognized Tax Benefits, Income Tax Penalties Accrued Accounts receivable, net Increase (Decrease) in Receivables Award Type [Axis] Award Type [Axis] Granted (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Options, 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[Member] Notes Receivable, Noncurrent, Portfolio Segment [Member] Repurchase of common stock Payments for Repurchase of Common Stock Eurodollar Eurodollar [Member] Stockholders’ deficit: Stockholders' Equity Attributable to Parent [Abstract] Company restaurant sales Company restaurants Food and Beverage [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Accounts and financing receivable, before allowance for credit loss Accounts And Financing Receivable, Before Allowance For Credit Loss Accounts And Financing Receivable, Before Allowance For Credit Loss Accounts and financing receivable, after allowance for credit loss Accounts and Financing Receivable, after Allowance for Credit Loss Fees deferred during the six months ended June 30, 2021 Contract with Customer, Liability, Period Increase (Decrease) Contract with Customer, Liability, Period Increase (Decrease) Operating lease obligations, less current maturities Long-term lease 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Restricted Stock Units (RSUs) [Member] Fee on unused portion of line of credit (percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Billed and unbilled receivables, accumulated allowance for credit loss Contract with Customer, Asset, Allowance for Credit Loss Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Revision of Prior Period [Domain] Revision of Prior Period [Domain] Total obligations Finance Lease, Liability Variable lease income Operating Lease, Variable Lease Income Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share Repurchase Program [Axis] Share Repurchase Program [Axis] Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Number of territories in which entity operates (territory) Number of Territories in which Entity Operates Number of Territories in which Entity 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instrument, term Debt Instrument, Term Loss Contingencies [Line Items] Loss Contingencies [Line Items] Property and equipment, net Property, Plant and Equipment, Net Total operating lease income Direct Financing Lease, Lease Income Prepaid gift card costs Other Prepaid Expense, Current Other non-current liabilities Other Liabilities, Noncurrent Fiscal Period Fiscal Period, Policy [Policy Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Repayment of long-term debt Repayments of Long-term Debt Less: allowance for credit losses Allowance for Doubtful Accounts, Premiums and Other Receivables Net income (loss) available to common stockholders per share: Earnings Per Share [Abstract] Applebee's Applebee's [Member] Applebee's [Member] Advertising provision adjustment Financing Receivable, Allowance for Credit Loss, Advertising Provision Adjustment Financing Receivable, Allowance for Credit Loss, Advertising Provision Adjustment Document Quarterly Report Document Quarterly 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