XML 45 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9
Public Housing Capital Fund Trusts Mark to Market PHC (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value $ 61,263,123atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority $ 62,056,379atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
Public housing capital fund trusts [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost adjusted for amortization of premium and discounts 59,887,921atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
65,901,114atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Gain 1,375,202atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
0atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Loss 0atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
(3,844,735)atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Estimated Fair Value 61,263,123atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
62,056,379atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Public Housing Capital Fund Trust I [Member] | Public housing capital fund trusts [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost adjusted for amortization of premium and discounts 27,414,100atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
27,979,527atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Gain 933,789atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
0atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Loss 0atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
(1,284,873)atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Estimated Fair Value 28,347,889atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
26,694,654atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Public Housing Capital Fund Trust II [Member] | Public housing capital fund trusts [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost adjusted for amortization of premium and discounts 11,999,721atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
17,486,739atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Gain 152,293atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
0atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Loss 0atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
(1,083,235)atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Estimated Fair Value 12,152,014atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
16,403,504atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Public Housing Capital Fund Trust III [Member] | Public housing capital fund trusts [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cost adjusted for amortization of premium and discounts 20,474,100atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
20,434,848atax_AvailableForSaleSecuritiesAmortizedCostBasisPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Gain 289,120atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
0atax_AvailableForSaleSecuritiesUnrealizedGainPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Unrealized Loss 0atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
(1,476,627)atax_AvailableForSaleSecuritiesGrossUnrealizedLossesPublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
Estimated Fair Value $ 20,763,220atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember
$ 18,958,221atax_AvailableForSaleSecuritiesFairValueDisclosurePublicHousingAuthority
/ atax_EntityByTrustAxis
= atax_PublicHousingCapitalFundTrustIiiMember
/ us-gaap_StatementBusinessSegmentsAxis
= atax_TrustPortfolioPhcftMember