Description of Business and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Significant Accounting Policies	Description of Business and Significant Accounting Policies Description of Business Highwoods Properties, Inc. (the “Company”) is a fully integrated real estate investment trust (“REIT”) that provides leasing, management, development, construction and other customer-related services for its properties and for third parties. The Company conducts its activities through Highwoods Realty Limited Partnership (the “Operating Partnership”). At June 30, 2021, we owned or had an interest in 27.3 million rentable square feet of in-service properties, 0.8 million rentable square feet of office properties under development and approximately 250 acres of development land. Capital Structure The Company is the sole general partner of the Operating Partnership. At June 30, 2021, the Company owned all of the Preferred Units and 103.8 million, or 97.3%, of the Common Units in the Operating Partnership. Limited partners owned the remaining 2.8 million Common Units. During the six months ended June 30, 2021, the Company redeemed 1,000 Common Units for a like number of shares of Common Stock. During 2020, we entered into separate equity distribution agreements in which the Company may offer and sell up to $300.0 million in aggregate gross sales price of shares of Common Stock. During the six months ended June 30, 2021, the Company issued 149,100 shares of Common Stock under its equity distribution agreements at an average gross sales price of $46.11 per share and received net proceeds, after sales commissions, of $6.8 million. Basis of Presentation Our Consolidated Financial Statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company’s Consolidated Financial Statements include the Operating Partnership, wholly owned subsidiaries and those entities in which the Company has the controlling interest. The Operating Partnership’s Consolidated Financial Statements include wholly owned subsidiaries and those entities in which the Operating Partnership has the controlling interest. We consolidate joint venture investments, such as interests in partnerships and limited liability companies, when we control the major operating and financial policies of the investment through majority ownership, in our capacity as a general partner or managing member or through some other contractual right. We also consolidate those entities deemed to be variable interest entities in which we are determined to be the primary beneficiary. At June 30, 2021, we have involvement with, and are the primary beneficiary in, an entity that we concluded to be a variable interest entity (see Note 3). All intercompany transactions and accounts have been eliminated. The unaudited interim consolidated financial statements and accompanying unaudited consolidated financial information, in the opinion of management, contain all adjustments (including normal recurring accruals) necessary for a fair presentation of our financial position, results of operations and cash flows. We have condensed or omitted certain notes and other information from the interim Consolidated Financial Statements presented in this Quarterly Report as permitted by SEC rules and regulations. These Consolidated Financial Statements should be read in conjunction with our 2020 Annual Report on Form 10-K. Use of Estimates The preparation of consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the amounts reported in our Consolidated Financial Statements and accompanying notes. Actual results could differ from those estimates. Insurance We are primarily self-insured for health care claims for participating employees. We have stop-loss coverage to limit our exposure to significant claims on a per claim and annual aggregate basis. We determine our liabilities for claims, including incurred but not reported losses, based on all relevant information, including actuarial estimates of claim liabilities. At June 30, 2021, a reserve of $0.4 million was recorded to cover estimated reported and unreported claims. Planned Investment Activities During the second quarter of 2021, we agreed to acquire a portfolio of office assets from Preferred Apartment Communities, Inc. (NYSE:APTS) (“PAC”). The core portfolio to be acquired consists of the following four Class A office assets in Charlotte and Raleigh, which encompass 1,630,000 square feet in total, and one mixed-use redevelopment site in Atlanta: 150 Fayetteville, Raleigh (CBD); CAPTRUST Tower, Raleigh (North Hills); Capitol Towers, Charlotte (SouthPark); Morrocroft Centre, Charlotte (SouthPark); and Galleria 75, Atlanta (Cumberland/Galleria). We have also agreed to acquire two non-core assets: a mezzanine loan related to a recently constructed office building in Atlanta; and Armour Yards, a multi-building creative office project in Atlanta. Our total investment, including the estimated value of the non-core assets, is expected to be $769 million, which includes $28 million of near-term building improvements and $5 million of transaction costs. The transaction is expected to include, among other things, the assumption of four secured loans collateralized by the core office buildings estimated to be recorded at fair value of $403 million in the aggregate, with a weighted average effective interest rate of 3.7% and a weighted average maturity of 10.8 years. The value of the non-core assets represents less than 12% of the anticipated total investment. The acquisition, which is subject to customary closing conditions, is scheduled to close within 30 days of the filing of this Quarterly Report. As of July 20, 2021, we have posted $60.0 million of earnest money deposits (of which $55.0 million were recorded in prepaid expenses and other assets at June 30, 2021) that are non-refundable except in limited circumstances. As part of the transaction, PAC will separately market Armour Yards for sale to a third party. If PAC chooses not to sell Armour Yards to a third party, we will close on the acquisition of the creative office project no later than the first quarter of 2022. Recently Issued Accounting Standards The Financial Accounting Standards Board (“FASB”) issued an accounting standards update (“ASU”) that provides temporary optional expedients and exceptions to the guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from LIBOR and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). Entities can elect not to apply certain modification accounting requirements to contracts affected by reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Entities can also elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met. The guidance in this ASU is optional and may be elected now through December 31, 2022 as reference rate reform activities occur. We will continue to evaluate the impact of this ASU; however, we currently expect to avail ourselves of such optional expedients and exceptions should our modified contracts meet the required criteria. Due to the business disruptions and challenges severely affecting the global economy caused by the COVID-19 pandemic, lessors may provide rent deferrals and other lease concessions to lessees. In April 2020, the FASB staff issued a question and answer document (the “Lease Modification Q&A”) focused on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under existing lease guidance, we would have to determine, on a lease by lease basis, if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A allows us, if certain criteria have been met, to bypass the lease by lease analysis, and instead elect to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. We have elected the practical expedient and will not apply lease modification accounting on a lease by lease basis where applicable. As a result, $1.6 million of deferred rent is included in accounts receivable on our Consolidated Balance Sheets at June 30, 2021.