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Stock-Based Compensation - Narrative (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 2,700,000us-gaap_AllocatedShareBasedCompensationExpense $ 3,000,000us-gaap_AllocatedShareBasedCompensationExpense  
Accrued employee compensation and benefits 10,913,000us-gaap_EmployeeRelatedLiabilitiesCurrent   25,722,000us-gaap_EmployeeRelatedLiabilitiesCurrent
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost not yet recognized 5,700,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Total compensation cost not yet recognized, period for recognition (in years) 1 year 9 months 17 days    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost not yet recognized 15,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
   
Total compensation cost not yet recognized, period for recognition (in years) 1 year 9 months 24 days    
LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 3 years    
Share-based compensation expense 300,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= din_LongTermIncentivePlanMember
(200,000)us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= din_LongTermIncentivePlanMember
 
Accrued employee compensation and benefits $ 2,300,000us-gaap_EmployeeRelatedLiabilitiesCurrent
/ us-gaap_AwardTypeAxis
= din_LongTermIncentivePlanMember
  $ 4,000,000us-gaap_EmployeeRelatedLiabilitiesCurrent
/ us-gaap_AwardTypeAxis
= din_LongTermIncentivePlanMember
LTIP | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Multiplier for target award based on total shareholder return on common stock (percent) 0.00%din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock
/ us-gaap_AwardTypeAxis
= din_LongTermIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
LTIP | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Multiplier for target award based on total shareholder return on common stock (percent) 200.00%din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock
/ us-gaap_AwardTypeAxis
= din_LongTermIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember