XML 96 R79.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Shareholders' Equity (Share Repurchases) (Details) - USD ($) $ in Thousands, shares in Millions | 12 Months Ended
--- | ---
Dec. 30, 2015 | Dec. 31, 2014 | Dec. 25, 2013
Equity, Class of Treasury Stock [Line Items] |  |  |
Common stock shares repurchased during the period (shares) | 8.5 | 5.3 | 4.2
Common stock shares repurchased during the period (value in US$) | $ 92,676 | $ 35,990 | $ 24,698
Share Repurchase Program 2015 [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Share repurchase, authorized amount (dollars) | 100,000 |  |
Remaining shares to be repurchase (value in US$) | $ 37,800 |  |
Share Repurchase Program 2013 [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Number of shares approved under stock repurchase program (shares) | 10.0 |  |
Share Repurchase Program 2012 [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Number of shares approved under stock repurchase program (shares) | 6.0 |  |
November 2015 Accelerated Share Repurchase [Member] |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Share repurchase, authorized amount (dollars) | $ 50,000 |  |
Common stock shares repurchased during the period (shares) | 3.5 |  |
Common stock shares repurchased during the period (value in US$) | $ 36,900 |  |
Remaining shares to be repurchase (value in US$) | $ 13,100 |  |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EquityClassOfTreasuryStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=denn_ShareRepurchaseProgram2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=denn_ShareRepurchaseProgram2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=denn_ShareRepurchaseProgram2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=denn_November2015AcceleratedShareRepurchaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |