1. CONSOLIDATION AND BASIS OF PRESENTATION
United Dominion Realty, L.P. (“UDR, L.P.,” the “Operating Partnership,” “we” or “our”) is a Delaware limited partnership, that owns, acquires, renovates, redevelops, manages, and disposes of multifamily apartment communities generally located in high barrier to entry markets located in the United States. The high barrier to entry markets are characterized by limited land for new construction, difficult and lengthy entitlement process, expensive single-family home prices and significant employment growth potential. UDR, L.P. is a subsidiary of UDR, Inc. (“UDR” or the “General Partner”), a self-administered real estate investment trust, or REIT, through which UDR conducts a significant portion of its business. During the years ended December 31, 2020, 2019, and 2018, rental revenues of the Operating Partnership represented 35%, 39%, and 42%, respectively, of the General Partner’s consolidated rental revenues. As of December 31, 2020, the Operating Partnership’s apartment portfolio consisted of 53 communities located in 15 markets consisting of 17,174 apartment homes.
Interests in UDR, L.P. are represented by operating partnership units (“OP Units”). The Operating Partnership’s net income is allocated to the partners, which is initially based on their respective distributions made during the year and secondly, their percentage interests. Distributions are made in accordance with the terms of the Amended and Restated Agreement of Limited Partnership of United Dominion Realty, L.P. (the “Operating Partnership Agreement”), on a per unit basis that is generally equal to the dividend per share on UDR’s common stock, which is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “UDR.”
As of December 31, 2020, there were 184.8 million OP Units outstanding, of which 176.2 million, or 95.3%, were owned by UDR and affiliated entities and 8.6 million, or 4.7%, were owned by non-affiliated limited partners. There were 184.1 million OP Units outstanding as of December 31, 2019, of which 176.2 million, or 95.7%, were owned by UDR and affiliated entities and 7.9 million, or 4.3%, were owned by non-affiliated limited partners. See Note 10, Capital Structure.
As sole general partner of the Operating Partnership, UDR owned all 0.1 million general partner OP units, or 0.1%, of the total OP Units outstanding as of December 31, 2020 and 2019. At December 31, 2020 and 2019, there were 184.7 million and 184.0 million, respectively, of limited partner OP Units outstanding, of which 1.9 million were Class A Limited Partnership Units as of both periods. Of the limited partner OP Units outstanding, UDR owned 176.1 million, or 95.3%, and 176.1 million, or 95.7%, at December 31, 2020 and 2019, respectively. The remaining 8.6 million, or 4.7%, and 7.9 million, or 4.3%, of the limited partner OP Units outstanding were held by outside limited partners at December 31, 2020 and 2019, respectively, of which 1.8 million were Class A Limited Partnership units as of both periods. See Note 10, Capital Structure.
The Operating Partnership evaluated subsequent events through the date its financial statements were issued. No significant recognized or non-recognized subsequent events were noted other than those noted in Note 6, Debt, Net.
2. SIGNIFICANT ACCOUNTING POLICIES
Recent Accounting Pronouncements
In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06, Debt—Debt With Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. The ASU simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The updated standard will be effective for the Operating Partnership on January 1, 2022; however, early adoption of the ASU is permitted on January 1, 2021. The Operating Partnership is currently evaluating the effect that the updated standard will have on the consolidated financial statements and related disclosures.
In April 2020, the FASB issued a Staff Q&A on accounting for leases during the COVID-19 pandemic, focused on the application of lease guidance in ASC 842, Leases. The Q&A states that some lease contracts may contain explicit