v2.4.0.6

Related-party Transactions (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jun. 30, 2012 Insurance_Policies
Related-party Transactions (Textual) [Abstract] |
Obligation period | 2 years
Common shares elects to sell | $ 4,000
Period of refusal to purchase common shares | 24 months
Insurance policies, number | 2
Cumulative cash surrender value of the policies | $ 2,786

X
- Definition Number of insurance policies. + References No definition available. + Details
Name: | dfz_NumberOfInsurancePolicies
Namespace Prefix: | dfz_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of obligation. + References No definition available. + Details
Name: | dfz_PeriodOfObligation
Namespace Prefix: | dfz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of refusal to purchase common shares. + References No definition available. + Details
Name: | dfz_PeriodOfRefusalToPurchaseCommonShares
Namespace Prefix: | dfz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dfz_RelatedPartyTransactionsTextualAbstract
Namespace Prefix: | dfz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Repurchase of stock nominal value. + References No definition available. + Details
Name: | dfz_RepurchaseOfStockNominalValue
Namespace Prefix: | dfz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Technical Bulletin (FTB) -Number 85-4 -Paragraph 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6812-107765 + Details
Name: | us-gaap_CashSurrenderValueOfLifeInsurance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant