v2.4.0.6

Derivative Instruments and Hedging Activities - Summarizes Fair Value of Derivative Instrument (Detail) (Derivative designated as hedging instrument [Member], USD $) In Thousands, unless otherwise specified | Sep. 29, 2012 | Jun. 30, 2012
--- | --- | ---
Summarizes the fair value of derivative instrument |  |
Fair Value | $ 467 | $ 472
Interest rate contract [Member] | Accrued expenses [Member] |  |
Summarizes the fair value of derivative instrument |  |
Fair Value | 186 | 186
Interest rate contract [Member] | Accrued retirement costs and other [Member] |  |
Summarizes the fair value of derivative instrument |  |
Fair Value | $ 281 | $ 286

X
- Definition Fair Value Of Interest Rate Contract Classified In Accrued Expense + References No definition available. + Details
Name: | dfz_FairValueOfInterestRateContractClassifiedInAccruedExpense
Namespace Prefix: | dfz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair Value Of Interest Rate Contract Classified In Accrued Retirement And Other Costs + References No definition available. + Details
Name: | dfz_FairValueOfInterestRateContractClassifiedInAccruedRetirementAndOtherCosts
Namespace Prefix: | dfz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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