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Partnership Agreement - Additional Information (Detail)
May 26, 1993
Partnership Agreement [Line Items]  
Compensation percentage on the basis of contract price 6.00%zzdd_MaximumCompensationPaidPercentage
General Partner [Member]  
Partnership Agreement [Line Items]  
Net profits or losses from operations amended 1.00%zzdd_NetProfitsOrLossesFromOperationsAmended
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
General Partner [Member] | Maximum [Member]  
Partnership Agreement [Line Items]  
Partners share in competitive real estate commission 3.00%zzdd_PercentageOfRealEstateCommissionLimitInSaleOfInvestmentProperties
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Partners share in competitive real estate commission 50.00%zzdd_PartnersShareInCompetitiveRealEstateCommission
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Limited Partners [Member]  
Partnership Agreement [Line Items]  
Net profits or losses from operations amended 99.00%zzdd_NetProfitsOrLossesFromOperationsAmended
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember