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Summary of Significant Accounting Policies (Schedule of Differences Between Book Value and Tax Basis of Net Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Summary of Significant Accounting Policies [Abstract]      
Financial statement basis of net assets $ 5,704us-gaap_MembersEquity $ 7,213us-gaap_MembersEquity $ 7,292us-gaap_MembersEquity
Tax basis of net assets (unaudited) 8,433zzhjb_TaxBasisOfNetAssets 8,900zzhjb_TaxBasisOfNetAssets  
Difference $ (2,729)zzhjb_NetAssetsDifferenceBetweenFinancialStatementBasisAndTaxBasis $ (1,687)zzhjb_NetAssetsDifferenceBetweenFinancialStatementBasisAndTaxBasis