Basis of Presentation	12 Months Ended
Dec. 31, 2019
Basis Of Presentation [Abstract]
Basis of Presentation	1. Basis of Presentation America First Multifamily Investors, L.P. (the “Partnership”) was formed on April 2, 1998, under the Delaware Revised Uniform Limited Partnership Act for the purpose of acquiring, holding, selling and otherwise dealing with a portfolio of mortgage revenue bonds (“MRBs”) that have been issued to provide construction and/or permanent financing for affordable multifamily and student housing residential properties (collectively “Residential Properties”) and commercial properties. The Partnership expects and believes the interest earned on these MRBs is excludable from gross income for federal income tax purposes. The Partnership may also invest in other types of securities that may or may not be secured by real estate and may make property loans to multifamily residential properties which may or may not be financed by MRBs held by the Partnership. The Partnership may acquire real estate securing its MRBs or property loans through foreclosure in the event of a default or through the receipt of a fee simple deed in lieu of foreclosure. In addition, the Partnership may acquire interests in multifamily, student and senior citizen residential properties (“MF Properties”) in order to position itself for future investments in MRBs that finance these properties or to operate the MF Properties until their “highest and best use” can be determined by management. The Partnership’s sole general partner is America First Capital Associates Limited Partnership Two (“AFCA 2” or “General Partner”). The general partner of AFCA 2 is Greystone AF Manager LLC (“Greystone Manager”), a wholly owned subsidiary of Greystone & Co., Inc. (collectively with its affiliates, “Greystone”). The Partnership has issued Beneficial Unit Certificates (“BUCs”) representing assigned limited partner interests to investors (“BUC holders”). The Partnership has also issued non-cumulative, non-voting, non-convertible Series A Preferred Units (“Series A Preferred Units”) that represent limited interests in the Partnership under the Partnerships’ First Amended and Restated Agreement of Limited Partnership dated September 15, 2015, as further amended (the “Partnership Agreement”). The Series A Preferred Units are redeemable in the future and represent limited partnership interests in the Partnership pursuant to subscription agreements with five financial institutions (see Note 19). The holders of the BUCs and Series A Preferred Units are referred to herein as “Unitholders.” All disclosures of the number of rental units for properties related to MRBs, taxable MRBs and MF Properties are unaudited.

Basis of Presentation

12 Months Ended

Dec. 31, 2019

1. Basis of Presentation

America First Multifamily Investors, L.P. (the “Partnership”) was formed on April 2, 1998, under the Delaware Revised Uniform Limited Partnership Act for the purpose of acquiring, holding, selling and otherwise dealing with a portfolio of mortgage revenue bonds (“MRBs”) that have been issued to provide construction and/or permanent financing for affordable multifamily and student housing residential properties (collectively “Residential Properties”) and commercial properties. The Partnership expects and believes the interest earned on these MRBs is excludable from gross income for federal income tax purposes. The Partnership may also invest in other types of securities that may or may not be secured by real estate and may make property loans to multifamily residential properties which may or may not be financed by MRBs held by the Partnership. The Partnership may acquire real estate securing its MRBs or property loans through foreclosure in the event of a default or through the receipt of a fee simple deed in lieu of foreclosure. In addition, the Partnership may acquire interests in multifamily, student and senior citizen residential properties (“MF Properties”) in order to position itself for future investments in MRBs that finance these properties or to operate the MF Properties until their “highest and best use” can be determined by management.

The Partnership’s sole general partner is America First Capital Associates Limited Partnership Two (“AFCA 2” or “General Partner”). The general partner of AFCA 2 is Greystone AF Manager LLC (“Greystone Manager”), a wholly owned subsidiary of Greystone & Co., Inc. (collectively with its affiliates, “Greystone”).

The Partnership has issued Beneficial Unit Certificates (“BUCs”) representing assigned limited partner interests to investors (“BUC holders”). The Partnership has also issued non-cumulative, non-voting, non-convertible Series A Preferred Units (“Series A Preferred Units”) that represent limited interests in the Partnership under the Partnerships’ First Amended and Restated Agreement of Limited Partnership dated September 15, 2015, as further amended (the “Partnership Agreement”). The Series A Preferred Units are redeemable in the future and represent limited partnership interests in the Partnership pursuant to subscription agreements with five financial institutions (see Note 19). The holders of the BUCs and Series A Preferred Units are referred to herein as “Unitholders.”

All disclosures of the number of rental units for properties related to MRBs, taxable MRBs and MF Properties are unaudited.