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Concentration of Credit Risk and Major Customers (Schedule of Leasing and Lending Revenues) (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Transportation, Containers [Member]    
Concentration Risk [Line Items]    
Percentage of concentration risk 35.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorPropertyClassAxis
= zzhjb_TransportationEquipmentContainersMember		 57.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorPropertyClassAxis
= zzhjb_TransportationEquipmentContainersMember
Transportation, Rail [Member]    
Concentration Risk [Line Items]    
Percentage of concentration risk 45.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorPropertyClassAxis
= us-gaap_RailroadTransportationEquipmentMember		 41.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorPropertyClassAxis
= us-gaap_RailroadTransportationEquipmentMember
Transportation, Rail [Member] | Interstate Commodities, Inc. [Member]    
Concentration Risk [Line Items]    
Percentage of concentration risk 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= zzhjb_InterstateCommoditiesInc.Member
/ us-gaap_MajorPropertyClassAxis
= us-gaap_RailroadTransportationEquipmentMember		    [1]
Transportation, Other [Member] | Exsif Worldwide Inc. [Member]    
Concentration Risk [Line Items]    
Percentage of concentration risk 33.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= zzhjb_ExsifWorldwideIncMember
/ us-gaap_MajorPropertyClassAxis
= us-gaap_OtherTransportationEquipmentMember		 45.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_MajorCustomersAxis
= zzhjb_ExsifWorldwideIncMember
/ us-gaap_MajorPropertyClassAxis
= us-gaap_OtherTransportationEquipmentMember
[1] Less than 10%