XML 23 R46.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Introduction and Basis of Reporting (Details) | Dec. 31, 2014 Countries restaurant States Territories
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Franchisor Disclosure [Line Items] |
Number of states in which entity operates | 50 us-gaap_NumberOfStatesInWhichEntityOperates
Number of territories in which entity operates | 2 denn_NumberOfTerritoriesInWhichEntityOperates
Number of foreign countries in which entity operates | 9 us-gaap_NumberOfCountriesInWhichEntityOperates
Number of restaurants | 1,702 us-gaap_NumberOfRestaurants
Franchised and licensed restaurants [Member] |
Franchisor Disclosure [Line Items] |
Number of restaurants | 1,541 us-gaap_NumberOfRestaurants / us-gaap_FranchisorDisclosureAxis = us-gaap_FranchisedUnitsMember
Company-owned restaurants [Member] |
Franchisor Disclosure [Line Items] |
Number of restaurants | 161 us-gaap_NumberOfRestaurants / us-gaap_FranchisorDisclosureAxis = us-gaap_EntityOperatedUnitsMember
California |
Franchisor Disclosure [Line Items] |
Percentage of restaurants operated (percent) | 24.00%denn_PercentageOfRestaurantsOperatedByGeographicLocationToNumberOfRestaurants / us-gaap_StatementGeographicalAxis = stpr_CA
Texas |
Franchisor Disclosure [Line Items] |
Percentage of restaurants operated (percent) | 11.00%denn_PercentageOfRestaurantsOperatedByGeographicLocationToNumberOfRestaurants / us-gaap_StatementGeographicalAxis = stpr_TX
Florida |
Franchisor Disclosure [Line Items] |
Percentage of restaurants operated (percent) | 8.00%denn_PercentageOfRestaurantsOperatedByGeographicLocationToNumberOfRestaurants / us-gaap_StatementGeographicalAxis = stpr_FL

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- Definition Number of Territories in which Entity Operates + References No definition available. + Details
Name: | denn_NumberOfTerritoriesInWhichEntityOperates
Namespace Prefix: | denn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents ownership percentage of restaurants operated by the entity or franchisees. + References No definition available. + Details
Name: | denn_PercentageOfRestaurantsOperatedByGeographicLocationToNumberOfRestaurants
Namespace Prefix: | denn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_FranchisorDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of countries in which the entity operates as of balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of restaurants. + References No definition available. + Details
Name: | us-gaap_NumberOfRestaurants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_FranchisorDisclosureAxis=us-gaap_EntityOperatedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FranchisorDisclosureAxis=us-gaap_FranchisedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_FL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_TX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |