XML 16 R54.htm IDEA: XBRL DOCUMENT v2.4.0.6

Assets Held for Sale (Details) (USD $)	12 Months Ended
	Dec. 26, 2012	Dec. 28, 2011	Dec. 29, 2010
Property, Plant and Equipment Assets Held-for-sale Disclosure [Abstract]
Assets held for sale	$ 0	$ 2,351,000
Impairment charges	$ 2,600,000	$ 800,000	$ 100,000

X

- Definition

The loss recognized for any initial write-down from carrying value to fair value less cost to sell for assets classified as held for sale.

+ References

No definition available.

+ Details

Name:	denn_AssetsHeldForSaleImpairmentCharges
Namespace Prefix:	denn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Current assets (normally turning over within one year or one business cycle if longer) that are held for sale apart from normal operations and anticipated to be sold within one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 46

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_AssetsHeldForSaleCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentAssetsHeldForSaleDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration